Wika this industrial gauge is made with a type 304 stainless steel case and bayonet ring and type 316 stainless steel wetted parts. Twist-on bayonet bezel ring. Removable laminated safety glass window. White aluminum dial wi2.5″ type 232.54 160 psi gauge – 1/4″ npt lm stainless steelth adjustable black aluminum pointer. Liquid fillable. Ambient operating temperature range is -40 to 140f if dry or silicone-filled and -4 to 140f if glycerine-filled. Compatible with u.s. Gauges 1961 and 1962, and ashcroft 1009-xpr, 1020s, 1009s and 1009sw.