The edges of the tarpaulin need to be folded, knotted and fused. It is normal that the actual size is about 5-10cm smaller than the screen size. PVC material, weight: 600gsm; thickness: 0.5mm; transparency: 99.99%; waterproof index: 100%; hole spacing: 50cm. Metal perforations along the edges. The reinforced edges are durable and the tarpaulin can be attached quickly and easily. Waterproof, weatherproof, UV resistant, non-shrinking, tear resistant, durable and can withstand all weather conditions. The clear PVC material is delivered folded, so slight creases may occur which will fade during use.