1.High quality:environmentally-friendly material,and co-extrusion technology allows for tough scuff-resistant surface. 2.Water-proof and fire-proof: No moisture absorbing, water permeation, and mildew arising.High flame retardant level. 3.Top return ensures close fit to wall ,Easy to install and will not crack, crumble, or warp. 4.OEM service: We can make custom