Chamberlain® Chain Drive Kit STRUCTURAL TUBING Must Choose Build-Out Distance: None

Must Choose Build-Out Distance: None

This is a Black Steel A36​ 8'' x 11

This is an A36/A51-50/A123 Galvanized Steel 1/2'' Diameter x 20' Round Bar

Black Steel A500 is highly versatile and ideal for structural frames

Durable handle features rubber overmolding for improved grip and comfort

Chamberlain® Chain Drive Kit STRUCTURAL TUBING Must Choose Build-Out Distance: NoneHigh quality, rigorously tested, and durable, only Chamberlain genuine parts are recommended for repairing your garage door opener. This Chamberlain Extension Kit is needed for garage doors that are eight feet high and are compatible with Chamberlain chain drive garage door openers. This chain drive rail extension kit features a quick install rail system. Featured Extends opener track for 8' high doors Includes rail extension, replacement chain, and