¾"NPTF - M33x2M flat 1000 Bar Product description Adapter reduction TWK Hammelmann®Connections : ¾"NPTF - M33x2M (flat) + seal ringDimensions : 41 x 62 mm.ID : ø 18 mm.Material : st. steel 316Part number : 304373Spare seal ring P/N : 304367.1