Fiberglass pultruded grating 2.0" , T-bar 50% open rate, fire-resistant, UV protection, Chemical resistant, ... Polyester (GP), Iso polyester (ISO), Vinyl ester (VE), PhenolicThickness:25mm, 38mm, 50mmLoading Bar type: T-bar, I-barOpen rate: 33%, 40%, 50 ... as your own design and technical request. fiberglass pultrusion grating, T-bar 2.0", 50% open rate