Specification: Type: Valve Caps Material: Stainless Steel Suitable For: Universal Feature: 1.With inside rubble seal ring， the valve caps anti dust or dirt into tyre while air leak. 2.Using special spanner， which equipped with valve caps， tighten the valve caps. Then， it would not unscrew by hands. 3.100% New stainless steel.Never rust. Never fade. Package: 4 x Valve Caps 1 x Key Spanner.