Easy-trim Cavity Closer Provides A Simple And Highly Effective Method For Closing Cavities Around Openings In Masonry Cavity, Timber Frame And Steel Frame System Wall Constructions. Suitable For Use In Both New Build And Refurbishment. An Easy Way To Achieve Building Regulations Compliance When Closing Cavities Where Cavity Widths Are Unknown. Available In 2 Profiles To Fit Cavity Widths Between 50-150mm.