Description 8′ – Norbert’s 12cm Quad Bar Mat System for 8′ rails consists of four mats covered with 18 oz. coated vinyl material with Hook and Loop fasteners for easy attachment. 12cm mats are fiSet of four 12cm thick gymnastics mats designed specifically for use with Quad Bars equipped with 8′ rails. Pick different Quad Bar Mat System colors, or choose from our mats for 6′ rails option here. IMPORTANT – CONSUMER WARNING & PRODUCT INFO – Click Here and please read carefully California Residents: Click Here for Important California Proposition 65 Warning Information If the shipping cost is not listed, Shipping costs will be emailed to you after your purchase. If you’d like a quote before buying, please call us at 877-496-7763.