This is the optional Carbon Fiber Battery Strap for the Team Associated B44 FEATURES: Carbon fiber construction, black in color Direct fit hop-up requires no model modification for use INCLUDES: Two Carbon Fiber Battery Straps REQUIRES: Installation following the model manual SPECS: Length: 3.4" (87mm) Width: .88" (22.5mm) Thickness: .10" (2.5mm) COMMENTS: For the stock battery straps order ASCC9707 kpm12/19/2007 ir/jxs