36mm Steel Insulation Washers and Screws for Insulation Fixings Including Tile Backer Boards XPS Insulation Thermopanel Marmox Wedi and More Packs of The 100 (25mm Screws x100 and 36mm Washers x100) :
wedi Fixing Washers - Tiling Supplies Direct
wedi Tools washers and screws – wedi
Wedi Fastener Kit - Non-Rust Screws and Tabbed Washers