Thomas 3297 Kynar and Viton Chemical Resistant Check Valve, 1/4" Diameter x 1-1/4" Length, 0 to 50 PSI, -40 to 126 degree C (Pack of 6) May be sterilized by autoclave Zero maintenance Use with acids, bases, water, chemical processing, and alcohols Constructed of chemical-resistant kynar body and viton Measures 1/4" diameter by 1-1/4 length