Package Includes] You will get 2 pieces of bike bleed spacer, which will have a great impact on your brake when used. [Material] The brake block is made of high-strength plastic, durable and wear-resistant, high intensity, effective and it is easy to use. [Special Design] This bike bleed spacer is specially designed for bicycle disc brake, which will have a great effect on your brake using. [Practical and Universal] The bike bleed spacer is designed to fit any brake calliper. Perfect for securing the calliper pistons during brake bleeding. [Necessary Kit] Suitable for various brake callipers, high strength and easy to usential tool for any DIY brake bleeder or bike mechanic. Suitable for hydraulic disc brakes, etc.