Upgrade those cheap plastic tire valve caps! Fellow San Diegans, 75Built aluminum tire valve caps seal and protect your shrader valves, designed to work with vehicle valves and bicycle valves alike. Inside each cap is a rubber o-ring seal with a knurled exterior grip to allow use in snow and ice. Anodized in custom durable colors and laser etched with the iconic 75Built logo on each top. Besides the super clean look, the anodizing provides an unbeatable abrasion resistant protective oxide layer to prevent atmospheric corrosion - no corroded valves!