Product Code:SV-BN1101 Accessories Of Gauge size:1/4"NPT X1/4 NPT  This sturdy brass needle valve, with teflon packing glandss, is designed especially for pressure gauge ervice, Tand will operate freely up to 2000 psi. he large round knurled handle offers maximum ease and precise control to throttle the pressure on & off to thegauge. CAUTION: A coil syphon should be used between needle valve and steam service.