... . hydraulic quick couplings; 2. carbon steel, 304, 316; 3. standard: ISO 7241-B; 4. Zero leakage at high flow rate; Bolev Hydraulics ... :Bolev facilities, welcome your visit!ISO 7241-B Quick release couplings, it features:ISO 7241-B standard;with poppet valve, quick sealed ... /2NPT1/2BLV-S2-06113543536G3/4NPT3/4BLV-S2-0812763.54141G1NPT1 steel ISO 7241-B quick coupling