N/A Needle Finish, SPI/SPE # 1 Bubble tight, low torque shut-off.Proven three prong, star handleTri-Oval geometryFast open/close operationFine metering control.24 pitch metering thread20% finer control adjustmentIntegrally designed panel mountingNo fasteners requiredMounts to panel thicknesses from 1/32" to 1/2"PTFE SealedChemical resistanceHigh PurityNo Elastomers (O-rings), metals or lubricantsNo corrosionNo contaminationMaterials of Construction.PVC is NSF Std 14 & 61 RatedCPVC is NSF Std 14 & 61 RatedPP is natural (unpigmented), reinforcedPVDF is NSF Std 14 & 61 Rated