Key features

• •ROLLER SIZE: Roller thickness is 0.5 ", Roller diameter is1.81", Shaft diameter is 0.44 ", Shaft length is 4 ".
• •PROFESSIONAL: Professional Bearings, Single Load 150 lbs, Super Quiet- Lubricated Bearings
• •MATERIAL AND DESIGN: Rollers are constructed from nylon that is softer and quieter than plastic or metal rollers and smoother than original equipment rollers.
• •LIFETIME GUARANTEE: reinforced dual-wall bearing cage, sealed 6200ZZ ball bearing plus double plating thickness on stem designed for MAX performance and ultra-life weather protection. Each garage door rollers can reuse 100,000 cycles.
• •SIMPLE TO INSTALL: Method 1 - Slightly bend track at seam to remove, replace roller, and move door to do next roller (repeat on other side). Method 2 - Remove screws that attach brackets to your door, secure cable before releasing bottom brackets that are under cable spring tension, clamp cable to track, slide out old rollers, place new rollers in their place, and screw in backers.