Bolu manufactures oem parts for all major mud pumps. All products are exchangeable with oem products and meet or exceed api-7k standards. Main pump brand & model National: 7p-50, 8p-80, 9p-100, 10p-130, 12p-160, 14p-220 Emsco: f-350/500/650/800/1000 fb-1300/1600 Ideco: t-500/800/1000/1300/1600 Gardner denver: pah, pz-7/8/9/10/11 Oilwell: a-850-pt a-1100-pt a-1400-pt a-1700-pt 3nb-1300c/3nb-1600/sl3nb-1300a/sl3nb-1600a/3nb-500/3nb-1000 Tsm1600/tsm750-440/400