Description
Reviews
| Brand | - |
| Category | Basic Building Materials / Floor Springs |
| Origin | - |
| Model Number | N-818 |
| Maximum Door Weight | 160 kg |
| Material | Heavy-Duty Steel Alloy |
| Finish | Silver Chrome Plated |
| Applicable Door Type | Glass and Framed Wood Doors |
| Installation Method | Floor Embedded / Surface Mount |
| Closing Speed | Adjustable Two-Stage |
| Opening Angle | Up to 90 Degrees |
| Durability Rating | 500,000 Cycles Tested |
| Warranty Period | 2 Years Manufacturer Warranty |
Anonymous
Mar 27, 2026
Rating: 4/5
Solid build quality
The unit feels very robust and well-made. Installation instructions could be slightly clearer, but once set up, it works perfectly. The adjustable speed is a great feature.
Anonymous
Mar 23, 2026
Rating: 4/5
Reliable heavy-duty solution
Does exactly what it says on the tin. Supports our solid wood door without sagging. Took off one star only because the mounting screws provided were a bit short for our specific floor thickness.
Anonymous
Mar 20, 2026
Rating: 5/5
Smooth operation
We replaced an old broken spring with this N-818 model. The difference is night and day. The buffer function prevents the door from slamming, which was a major concern for us.
Anonymous
Mar 17, 2026
Rating: 5/5
Perfect for heavy office doors
Installed this on our main entrance glass door which weighs about 140kg. It handles the weight effortlessly and the closing action is smooth and quiet. Highly recommended for commercial use.
Anonymous
Mar 09, 2026
Rating: 5/5
Professional grade hardware
As a contractor, I have installed many floor springs. This authentic N-818 is top-tier. The finish is durable, and the mechanism is precise. Will definitely order more for future projects.
Anonymous
Mar 01, 2026
Rating: 5/5
Great value for money
Compared to other brands, this ZKHG model offers excellent performance at a better price point. It has been running for three months without any issues in a high-traffic area.
Q: Can I adjust the closing speed myself after installation?
A: Absolutely. There are adjustment valves on the unit that allow you to customize both the main closing speed and the latching speed using a standard screwdriver.
Q: What is the minimum door weight required for this spring to work effectively?
A: While rated for up to 160kg, it performs optimally on doors weighing between 80kg and 160kg. For lighter doors, a smaller model might be more appropriate.
Q: Is this suitable for a double glass door setup?
A: Yes, the N-818 can be used for double doors, but you will need to purchase two units, one for each door leaf, to ensure balanced operation.
Q: Does this come with a template for cutting the floor hole?
A: Yes, the package includes a paper installation template to help you mark the exact dimensions needed for embedding the spring into the floor.
Q: Is the chrome finish resistant to corrosion in humid environments?
A: The chrome plating provides good resistance to rust and corrosion, making it suitable for most indoor environments. However, for coastal areas with high salt exposure, regular maintenance is advised.
Mobile Retractable Spray Booth for Furniture - Foldable Track-Mounted Painting Room
$6,240.00
Long Handle Bristle Paint Brush - Hog Hair Brush for Oil Painting, Acrylic Wall Art, and Children's Drawing
$1.80
Electrostatic Powder Coating Equipment and Electronic Powder Dispenser Supply
$17,250.00
DIY Toast-Shaped Silicone Mold for Handmade Soap - Square Soap Making Mold
$105.00
Kindergarten Sponge Stamp Set – Mushroom-Head Circular Printing Tools for Kids' DIY Art and Painting Kits
$3.50
Heavy-Duty Lifting Chain Set – Manganese Steel Chains with Hooks, Rings, and Hoist Accessories
$198.00
Car Tire Stone Removal Tool, Multi-Function Groove Hook for Portable Tire Picking and Cleaning
$11.50
m Dogs Strap Auto Retractable Dual Dog Leash With
$199.92
Traditional Wooden Sheepskin Rattle Toy – Safe for Teething Newborns, Handcrafted Baby Bell Shaker
$17.80
Soilless Cultivation Equipment Plant Factory Display Rooftop Hydroponic Pipe System for Leafy Vegetables and Fruits, Type A Planting Rack
$2,620.16
Premium Ceramic Tea Canister and Gift Box Set - Empty Packaging for Black Tea, Pu'er, White Tea, and Biluochun
$121.00
Posture-Correcting Hole-Grip Pencils for Grade 1 - Triangular Barrel, Break-Resistant, Non-Toxic HB for Daily Writing and 2B for Exams
$3.02
Genuine OEM AC Blower Motor Heater Fan for Buick Excelle GT, Cavalier, and Monza
$255.00
TA1 TA2 Titanium Capillary Tubes - Small Diameter Titanium Pipes - GR5 Titanium Alloy Tubes
$240.00
Industrial Spray Painting Wipe Cloth Auto Bake Finish Film Application Degreasing Cloth Non-Woven Absorbent Paper Lint-Free Paper Electrostatic Dust Removal Paper
$75.66
US Standard Buttress Thread Inserts 22ER 16ER 11NR 16 10 12 8ABUT Internal 7 External 45 Degree
$43.20
Coating Workshop Cleaning Rags GAE Industry White Scrap Cloth Nylon Machine Cloth Blocks Industrial Glue Removal Furniture Cleaning
$96.31
Natural 8A Yellow Tiger Eye Loose Beads - Round Cat's Eye Bracelet for DIY Jewelry Making
$17.28
Paper Blending Stumps Art Set for Highlighting, Sketching, and Smudging - Professional Drawing Tools for Artists and Beginners with Rice Paper Details and Oil Pastels
$6.80
Rubber Speed Bump 1000x350x40mm Herringbone Pattern
$96.89
![Xian Kan Yun Shu [Cloud Lark] Elegant Brush Washer, Hand-Painted Orchid and Sparrow Design under Glaze, Ceramic Water Pot](https://www.gosteppe.com/cache/small/product/269176/legacy-main-b83d0e5d0aba33de561a2b48.webp)
Xian Kan Yun Shu [Cloud Lark] Elegant Brush Washer, Hand-Painted Orchid and Sparrow Design under Glaze, Ceramic Water Pot
$21.20
Cable Organizer Hook-and-Loop Straps for Data/Charging Cables, Laptop Power, Mouse, Headphones, and Under-Desk Network Wiring
$7.48
Power Strip Organizer Box, Desktop Socket Concealment Case for Charging Cables and Power Cords, Hidden Storage Shelf
$21.93
Automatic Dairy Beverage Filling Machine - Fully Automatic Equipment for Milk, Soy Milk, and Drink Bottling
$1,316.00
Compact Invisible Retainer Case - Leak-Proof Sealed Storage Box for Children's Orthodontic Aligners
$12.50
07521 Scouring Pad Roll for Woodworking, Furniture, Paint Sanding, Metal Deburring, and Brushed Finish - Purple 600 Grit
$81.00
Shiya Insulated Display Cabinet, Constant Temperature Warmer for Commercial Use, Crispy Pork Belly, Roast Duck, Roast Chicken, and Cooked Food
$388.00
Wooden Soap Trimmer with Drawer, Soap Planer and Edge Shaper, Free Shipping
$32.00
Hell Training Rock Guitar by Shinichi Kobayashi Electric Guitar Textbook Tutorial Speed Picking
$106.00
Zhao Mengfu Running-Cursive Calligraphy Copybook - Spring River in the Flower Moon Night Tang Poems for Tracing and Practice
$16.00
