Grey carpet matting with raised aluminium ribs for the ultimate in dirt scraping action fully closed surface stops dirt getting underneath total height 13mm 100 polypropylene fibres with latex backing nb the aluminium strips run the longer dimension of the mat as such the longer dimension is intended to be the width of the mat which gives the required scraper action when travesed for cut lengths the aluminium strips run the length of the piece ordered and are intended to cover the width o