Spacers designed for use on VEX EDR High Strength Shafts. Spacers are often used to properly position objects on a shaft or to reduce friction between rotating objects. Eliminate slop on shafts Add space between metal parts Includes four sizes 30x 1.6mm (1/16in.) 20x 3.175mm (1/8in.) 10x 6.35mm (1/4in.) 10x 12.7mm (1/2in.)