This ¼ turn cap and gauge combination is designed for use on metal reservoirs. It has a positive stop, bayonet lock to prevent over tightening. The design enhances a user's ability to grip and turn the cap/gauge and is ideal for heavy-duty applications. The cap has multiple vent and graphic options, while the gauge is available with a verity of dial options and can be custom calibrated to fit reservoir configurations. The product is induction welded for long-lasting durability and performance.