Fiberglass pultruded grating 38mm I-bar 60% open rate, fire-resistant, UV protection, Chemical resistant, ABS certificate ... Bar type: T-bar, I-barOpen rate: 33%, 40%, 50%, 60%Panel size: 1.2x6m or any size as your request ... design and technical request. fiberglass pultrusion grating, I-bar 38mm, 60% open rate