*PACKS OF 10* An economical solution designed for closing a door cavity around openings in masonry, timber frame and steel frame constructions such as a window or door reveals .The UPVC outer acts as a damp proof barrier and the insulated core is moisture resistant, all of which allow for excellent thermal performance. Features: Available in two profiles to fit cavity widths: 50-100mm and 100-150mm. Simple to install, with cut-to-size grooves. Multi-width design overcomes cavity width variations. Manufactured in accordance with BS EN 13163: 2012 +A1: 2015. Satisfies all NHBC standards. Compliant with all relevant British Standards.