Sur-Lock II is a plastic coupler designed to couple HDPE & PVC conduit and can also be used to couple dissimilar conduits such as HDPE to PVC, threaded or non-threaded metal conduit, or fiberglass (FRP) conduit. One person installation Re-enterable, no special tools required Airtight and watertight No I.D. reduction Excellent pull out strength on HDPE, PVC, FRP, and steel No-Stop version available for confined areas or repairs ETL Listed to CSA STD C22.2 18.3-04 Listed to UL STD 514B PULL OUT STRENGTH 700(LB)