4.7 out of 5 stars (15) Total Ratings 15, $22.50 New. Craftsman 8' RAIL EXTENSION KIT # 953728 Belt Drive Garage Door Openers. Complete kit includes: (1) Front Rail Section, (3) Middle Rail Sections, and (1) End Rail … 8-ft Belt extension kit used to successfully complete Garage Door Opener installations on garages with 8-ft garage doors. Compatible with CRAFTSMAN garage door openers. The Sommer 1628V008 garage door opener 5-ft rail extension kit from Garage Door Supply Company will extend the reach of a Sommer Synoris garage door opener rail for 7-ft and 8-ft high doors to accommodate a 12-ft or 14-ft tall garage door. For use with various LiftMaster® and Chamberlain® Garage Door Openers; installed on a 7 ft. garage door. Craftsman 8' Rail Extension Kit for BELT DRIVE Garage Door Openers … Craftsman 8-ft Garage Door Opener Rail Extension Kit 53726. The 10 ft. Belt Rail Extension Kit is used to complete garage door opener installations on belt drive garages with up to 10 ft. garage doors. 5 out of 5 stars (3) Total Ratings 3, $44.99 New. 041A5665 is a 7 ft. Square Rail Assembly Replacement Kit. Genie ChainDrive 550 Garage Door Opener - Heavy-Duty Chain Drive System - Includes 2, 3-Button Remotes, Black & Chain Drive Garage Door Opener 8ft Rail Extension Kit 4.6 out of 5 stars 908 179.14 … Includes steel rail extension, …