RRA/RRV - Triplex Plunger Pump. Featuring - Manifold: High strength forged brass for long term use. Bolts: Eight 6mm. Plungers: New ceramic plungers, thicker wall to help prevent thermal shock. Valves: Stainless steel, valve seat o-ring is side mounted. Seals: high quality high pressure seals. new low-pressure seal with built in scrapper. Piston Guides: Two piece piston guides. Drive End: New connecting rod with 12% more load surface. Large side cover sight glass, oversized bearing. Rear cover oil drain. Crankshaft: Forged, precision ground.