Home » headsets » Semi Integrated Headsets » pm5 SEMI-INTEGRATED HEADSET - ANGLE LIMITED PM-5 ZS44/28.6-26tpi | ZS44/30 Alloy Cap / Steel Cups & Crown Race Cartridge Bearings Angle Limited Top Nut: 25.4 CUP O.D.: 44 Crown Crown: 30 Height: 25.2 Technical Diagram