[Compatibility]41A3589-3 Belt Assembly Kit for 7ft Residential Garage Doors. Compatible for LiftMaster garage door opener models: 1280 1280R 1270 series, compatible for Chamberlain models 139.53800SRT 139.53664SRT 139.53664SRT2 1280 1270 8200, 8100, 9200, 9500. [Specifications] The 41A3589-3 drive belt assembly has 12 grooves every 6 inches on the belt. Fits 7ft garage door height. Also known as part numbers 041A3589-12, 41A3589-12, 41A3589, 041A3589-3. [Quiet] The 041A3589-3 belt has fine workmanship, precise dimensions, and durability. It has good wear resistance, corrosion resistance, and anti-slip properties. It is quiet during operation and reduces noise and vibration. [Sturdy Structure]The 41A3589-3 belt drive structure is composed of high-density PU and military-grade steel wire. Each belt has passed more than 30,000 bending life tests and has strong load-bearing capacity, providing sufficient safety for daily use. Colour:Black Material:plastic+metal Package Contents: 1 x 41A3589-3 belt Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.