Easi-Close Insulated Cavity Closer 50mm-100mm   Easy fit insulated cavity closer 2.4m Length easi-close can be installed in a variety of ways: tack to window frame if built-in. built-in as work progresses friction fitting. Easi-close can be installed after the reveal has been constructed by fixing to the inner leaf using grab adhesive. Price per Pack of 10 YBS 10pk Easi-Close 50mm-100mm Insulated Cavity Closer