Genie GEN39026R Garage Door Opener Extension Kit for 5-Piece Belt-Drive Tube Rails, one size, Metallic An extension kit will extend the 5 piece, belt drive tube rail for a 7' high garage door to accommodate an 8' high garage door. This extension kit is specifically designed for Genie belt drive model garage door openers that use the tube style rail. Models that this garage door opener extension kit works on are models 2055,3053,3055,7055,7155 Features WORKS ON 8 FT HIGH GARAGE DOORS: Enables tube style genie belt drive garage door operators to fully open 8' tall doors. COMPATIBILITY: Works on ultra-quiet Genie belt drive models: 2055,3053,3055,7055,7155 EASY TO INSTALL: Works with the rail assembly included with the garage door opener and easily snaps together for installation INCLUDES: rail extension, 8 FT belt, easy-to-follow instructions USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.