The LRG SU System Pin-Type Cover fits insulators 10.5" in diameter and is used with 2.5" Class 4 Extended Lip SU System Line Hose.  Always use clamp pins to secure the device into position.  Pinning rings have been placed on the cover's arms to prevent separation.  Made from orange Type II SALCOR® Synthetic Rubber.  May be installed with a hot stock or rubber gloves.  Complies with ASTM D1049 standards.