This is a pair of Robart Gear Door Mounting Brackets. FEATURES: Used with struts that are 1/2" in diameter Aluminum construction INCLUDES: 2 brackets with set screws Set of instructions SPECS: Width of base: 1/4" (6.35mm) Length of base: 5/8" (14.47mm) REQUIRES: Nothing COMMENTS: The customer needs to be sure that struts are 1/2" in diameter. rda5/17/06 ir/jxs