Our 200mm Non-Slip Battery Straps (measured from plastic loop to the beginning of the hook section of the strap) have a non-slip coating to help keep your batteries securely in place. These work with all of our BowHouse RC battery trays, as well as with stock battery trays in the Axial SCX10 / SCX10 II, RC4WD Trail Finder 2 (TF2), RC4WD Gelande 2, and many other applications. Sold in pairs.