Made in USA | A quality line of Heavy-Duty HD Couplings where structural reinforcement and higher sealing pressures are required | Wider foot print on the joint and increased number of higher torque capacity clamps | Added measure of structural rigidity and enhanced sealing pressure for applications requiring added safety margin against leakage | Fully certified to ASTM C1540, ASTM C564 and FM 1680 (Class 1 and 2), and carries IAPMO, and Canadian Std. Association certification