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1. Outer Hull:#45 steel forging, HB180-200 Hardness
2. Inner Sleeve: Zirconia ceramic
3. HP design with shoulder-on-hull tp prevent inner sleeve slippage
4.Surface finish 4-8 RMS,Hardness HV 0.3 kg/mm-110/1200(92-94 Rockwell) 5.Longer service life: over 4000 hours, 5-10 times higher than high chrome sleeve liner 6. Max.Operating Pressure: 7500 PSI
