... heavy metals, BTF-WN-50DSPECIFICATION: 50(+_2)mm high, PE yarn, monofilament yarn 14300dtex, 3/8" ,140s/m 14700density,2mm backing. The ... drain, no element of Pb,Cd,Cr,Hg, 4 colour yarn seemed emulational like natural grass.Easy to installation, need not ... . Long using life more than 10 years.The straight & curly yarn construction surface, make the yarn stand-up