M33x2M flat - ½"NPTF 1000 Bar Product description Adapter reduction TWK Hammelmann®Connections : M33x2M (flat) + seal ring - ½"NPTFDimensions : 41 x 46 mm.ID : ø 18 mm.Material : st. steel 316Part number : 304372Spare seal ring P/N : 304367.1