The fracturing pump fluid end blocks and spares are 100% interchangeable to BJ, Gardner Denver, Halliburton, Serva, FMC. We can supply the Spare Parts for the Pump Models as follow: HQ 1400 4 fracturing pump SPM2000-5" fluid end HQ-1400/2000 Frac Pump Fluid End Asembly SPM-TWS 600 Triplex Plunger Pump SPM QWS2500 Quintuplex Plunger Pump Compatible TWS-2000/2250 Frac Pump Fluid End Assembly Halliburton HT400 plunger pump Serva TPA600 pump SERVA pump: TPA-400 plunger pump . TPA-600 plunger pump. TPB-600 plunger pump. TPA-400 plunger pump GD-2500 Quintuplex Plunger Pump Compatible OPI 1800AWS Frac Pump Compatible