The TECHT Stainless Steel Gauge Pin allows players to observe and/or monitor their operating pressure. The TECHT Gauge Pin is constructed of stainless steel. The S.S. Gauge Pin can be used during play or can be used just during tuneups. The pin also includes a 0-600 psi micro gauge to easily reference your operating pressure. As with all TECHT Products the Stainless Steel Gauge Pin carries a limited lifetime warranty.