The PRIMO Zia 25T Black Guard SPROCKET is a high-quality aluminum sprocket designed specifically for Street style riders, BMX bikes, including Old School, Flatland, and Racing models. With 25 teeth and a durable design, this sprocket is compatible with all  brand bikes and features a standard mounting type for easy installation. The sprocket also includes 2 hat washers for 19mm and 22mm fitments, with a 24mm std bore. added support and durability, making it a reliable choice for street grinding riders looking to upgrade their bike's chainring and gear system.