Gauge Guards protect expensive, fragile gauge diaphragms and other similar instruments from being dented or punctured during calibration, routine maintenance and autoclave procedures. Manufactured using U.S.P. Class VI PlatinumCured Silicone and 316 stainless steel. A cost-effective step in assuring maximum service life and accurate results from your instruments and gauges. Gauge Guard Protectors are specially designed to snap onto sanitary Tri-Clamp® fittings.