API standard Safty Clamp API 7K and ISO 9001/2000 inspection OEM interchangeable good ... , N1300, C-250, K-700, 14-P-220, E-700/G-1000, K-500, K-380, K-500A/700A, C-250 ... , OPI, Ellis Williams, Wilson, Gaso, Skytop/Brewster. API standard Safty Clamp