Made in USA | Same as Super Heavy-Duty HD Green Shield, but with a 5/16” inch hex head screw | Value-engineered alternative to the HD Green Shield | No-risk, lower cost choice when performance criteria can’t be altered | In full compliance to ASTM C564, ASTM C1540, FM 1680 (Class 1 and 2), and carries IAPMO, and Canadian Std. Association certification