The DURA-LIFT Ultra-Life 2 '' cloth Garage Door Roller with built 6200Z Bearing on 4 '' Stem -LRB- 10 Pack -RRB- is a replacement roller for retired, crying or fitful country, track-style garage doors. The heavy-duty 6200Z bearing the ball bearings so there is no rubbing or friction, in combination the nylon wheel, results in the quieter and smoother opening and closing of your garage door. The Caged bearing roller cycle rating by 10 times = 100,000 door open/close cycles at a 120 pound load. The pluperfect DIY garage door to reduce your garage opening and closing noise by up to 75 % ! . Technical Details Product : exceeds 100,000 cycles at 120 pound load Roller wheel : polyamide 6 wheel with 6200Z bearing Wheel bodied : polyamide 6 wheel offers lasting, Ultra-Quiet ™ operation Bearing grease : lubrication groove contains Mobilgrease XHPTM 222 grease for politic operation terminated an sprawly period of time criterial shaft size : 4-5/8 '' length 7/16 '' diameter criterial wheel size : 1-13/16 '' diameter, 1/2 '' thickness, 1/2 '' shoulder DURA-LIFT ™ 100 % SATISFACTION GUARANTEE : DURA-LIFT ™ products are distributed exclusively by WESSOL and are warranted against defects or failures for one year from the purchase date. Should you a defect or failure during this period, WESSOL will assist you or replace the product -LRB- s -RRB- at no added cost. indigence or Installation Help ? . reach KO'd and ask our experts ! . PLEASE ALL HARDWARE American Samoa DIRECTED.