The Metal Racer is made of aluminum with a straight body profile, along with SG Sticker response and a string-centering concave bearing for advanced play. However, the yo-yo's most notable feature is the plastic Racer Caps modeled after car wheels. These caps come in two different variations; a spoked variant for a wheel effect, and one for finger spin tricks. Plus, they are also usable on yo-yos that have the FHZ's side cap system. The yo-yo is also compatible with Mod Spacers (by installing a long enough axle) and Performance Rings. Weight 60 grams Dimensions Diameter: 54mm Width: 37mm Material Aluminum with plastic Racer Caps Bearing size Size C Response system Duncan SG Stickers (large bearing)