Here is the spec list on the limited edition @mishimoto X Tuerck shift knob. Check it out below and grab it on mishimoto.com. Lightweight design weighing 2.0 oz. Ergonomic shape allows for smooth shifting and comfortable hand position. Machined from lightweight thermoplastic for durability without extra weight or annoying heat retention. Includes four plastic insert sizes to fit various applications Insert thread pitch sizes: M8 x 1.25, M10 x 1.25, M10 x 1.5, M12 x 1.25.