It is 3 layers, upside and downside is modified PVC, core layer is high foam polymer. ... , toughness and hardness, leaking proof and fireproofing....thinkness: 2mm,2.5mm,3mm,4mm,5mmwidth: 1.35M , 1.13Mlength: up to youcolor: single color ... --green,blue,terra-cotta, yellow,white,red......double color: up and down is different UPVC 3 ...