Description FlexWorks™ Double Flexible Entry Boots are designed to seal the sump penetration. These entry boots incorporate both internal and external band clamps to provide additional sealing in harsh environments. Boots firmly fasten and seal to the sump wall using steel studs, fasteners and a galvanized compression ring. These entry boots are available in a variety of sizes and designs to accommodate rigid and flexible piping, ducting and conduit. The OPW DEB-0751 can be used on 1", 3/4", or 1/2" conduit.