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.
YP8 YP-80000 Book Block Pressing Machine Supply Robust Structure Reliable Application
$23,790.00
Feileniao Four Seasons Flowers Line Drawing Atlas - Chinese Ink Painting Guide for Brush Beginners
$39.90
365 Days! Drummer Training Plan - Beginner Self-Study Guide for Drum Kits and Jazz Drums with Tutorial Audio
$55.00
New Rechargeable Electric Incense Making Machine – Compact Home Device for Extruding Coil, Sandalwood, and Stick Incense, Manual Incense Crafting Equipment
$268.00
Tire Stone Removal Hook, Multi-Function Tool with Built-in Screwdriver for Window Breaking and Self-Defense
$7.51
Pearl Sand Wax, Ice Flower Wax, Floating Aromatherapy Candle Colored Suspended Particles for Atmosphere Decor and DIY Crafts
$5.78
No-Drill Wall-Mounted Toilet Paper Holder and Storage Shelf for Bathroom
$19.30
Chain Sling Lifting Shackle Steel Chain Single Leg with Hooks on Both Ends for Towing, 2m Length, 5 Ton Capacity
$79.00
120L Milk Pasteurizer, Homogenizing Mixer, and Ice Cream Aging Machine - Factory Supply
$59,892.00
LUBOSHI Automatic Retractable Hose Reel 12MM Water Drum PVC Braided Hose for Car Wash, Gardening, and Auto Repair - 15 Meters
$383.00
No-Drill Over-Toilet Storage Rack - Wall-Mounted Bathroom Organizer for Tank Gap
$19.84
Commercial Automatic Multi-Function Vegetable Cutter for Slicing, Dicing, and Shredding
$1,782.00
Zhonglian Hamburger Food Warmer Display Cabinet 1.2m 1.5m 3-in-1 Warmer Double-Layer Display Cabinet Crisp Keeper
$3,376.00
A3 Watercolor Paper 300g Thickened Cotton Pulp Fine Grain, A4 Medium Grain for Beginners, 4K Wood Pulp Cotton Blank Hand-Painting Paper, Square Art Coloring Paper, Postcard & Bookmark Paper
$18.90
Sketch Gray Tone Pencils for Art Students, Detail Highlight Blending Stumps, Makeup Sponge Pens, Quick Sketch Eraser Pen Sets
$6.46
Disposable Vacuum Cleaner Filter Mesh - Non-Woven Dust Bag with Elastic Band for Home Use
$4.50
Systematic 3D Painting Learning Package (Includes 100 Lessons)
$798.00
6/8/12Pcs Silicone Red Wine Glass Identification Marker Char
$27.44
Stainless Steel Sink Drain Basket – Expandable Kitchen Dish and Vegetable Rack
$12.35
Tungsten Carbide Internal Thread Tool Holder – Anti-Vibration CNC Turning Insert for Small Bore Threading (CNR)
$73.02
Henkel Loctite SICOMET 8400 77 99 40 50 Instant Adhesive for Metal and Rubber with BS Accelerator
$69.00
Colored Pencil Set, Basswood Hexagonal Raw Wood Pencils for Painting and Art Coloring
$21.68
Small Ceramic Herb Jar – Imperial Yellow Hexagonal Double-Layer Container for Angong Niuhuang Wan Pills
$8.80
Spanish Brush Master ESCODA PERLA Pearl White Toray Nylon Round Watercolor Brush, Short Handle 1430
$44.20
Qiwei COD Rapid Detector QW-COD-T/B - Chemical Oxygen Demand Tester with Potassium Dichromate Digestion for Wastewater
$3,330.16
Natural Wheat Straw Baby Rattle - Children's Musical Instrument Toy, Maraca, Shaker Bell for Newborns - Orff Music Instrument
$10.80
CANDLE.LAB | 100% Cotton Unwaxed Candle Wick Roll - Thin Stem Chandelier Candle Making Supplies #31
$25.00
Pneumatic Rotary Vibrator - Feiyu GT25 Pneumatic Vibrator - Quality Guaranteed
$997.00
Quick-Frozen Vegetable Deodorizing Sterilization Washer IRW Zhongfang Ready-to-Cook Vegetable Production Washing Line Semi-Finished Vegetable Processing Oxygen Equipment
$27,000.00
KETELES 105R7120 Carbon Fiber Road Bike - Lightweight Racing Bicycle with Gear Shifter
$11,339.00
