Features: 1.Used to reduce air flow, thus reducing tobacco burning and saving tobacco. 2.Compact size and light weight, easy to use. 3.Rust resistance and corrosion resistance, easy to clean. 4.Adjustable size, can fit your pipe well. 5.Suitable for all normal pipe, very convenient. specification: Used to reduce air flow, thus reducing tobacco burning and saving tobacco. Compact size and light weight, easy to use. Rust resistance and corrosion resistance, easy to clean. Adjustable size, can fit your pipe well. Suitable for all normal pipe, very convenient. : Material: Stainless steel Weight: 4g/0.1oz Color: Silver Product Size: 3.1 * 2.4 * 1.4cm / 1.2 * 0.9 * 0.6in Package Size: 7 * 5 * 1cm / 2.8 * 2 * 0.4in Package List: 1 x Pipe Windproof Cap