John Guest PI050801S Stem Adapter BSPT - 1/4 x 1/8 BSPT. John Guest PI050801S Stem Adapter BSPT - 1/4 x 1/8 BSPT Features: Gray acetal copolymer construction Nitrile O-rings. Suitable for water air inert gases And pneumatic applications or vacuum John Guest PI Series Acetal Fittings Additional Details ------------------------------ Product description: John Guest PI050801S Stem Adapter BSPT - 1/4 x 1/8 BSPT. John Guest PI050801S Stem Adapter BSPT - 1/4 x 1/8 BSPT Features: Gray acetal copolymer construction Nitrile O-rings. Suitable for water air inert gases And pneumatic applications or vacuum John Guest PI Series Acetal Fittings