FW HP comes in six models.Its maximum flow rate of 399L/min and a maximum pressure of 300Bar. Selected forged Stainless Steel pump head, high strength, no pores, long life, safe operation. The plunger is precision machined solid porcelain spray plunger to extend its durability and applicability. Better oil seal system with stainless steel spring to ensure enough tension, forged manifold, spherical cast iron/stainless steel material available, die-cast alloy crankcase, aluminum connecting rod, high precision finish, ceramic plunger, precision grinding, double pressure packing.