Front Belt Pulley: Made of 45 steel with surface galvanization. 23/28 teeth can be chosen, black only.
Rear Belt Pulley: Made of 7075 T6 aluminum with surface anodized. 94 teeth, various colours.
Rear Fork Connecting Plate: Made of 304 stainless steel. Silver only.
Misc
Significantly reduces the noise of your bike to make it quieter and more stealth.