Small sprocket: 20CrMnTi galvanized 22. Large sprocket: 55 # galvanized 48 teeth. Hi Quality 530/120 Silver O-ring Chain. Kit includes a chain breaker tool. Price for all in our picture. High quality and newly updated kit. Cut chain to fit with the wheel and axle all the way forward, for maximum adjustment as the chain wears in. Due to different time zone, Pls forgive us maybe we couldn’t reply you as quickly as you expected. We will not accpet mark ” gift” on the packge.