Approved according to the interenational standard for welding curtains ISO EN 25980 Blocks and protects bystanders from harmful ultraviolet and infrared radiation as well as for blocking intense visible light. Fully seamed edges, all around. Ultra-strong, reinforced suspension eyelets embedded, all around. Unique snap-fastener system allows inline connection of multiple curtains. Includeds steel suspension rings, sized to fit 33.7mm tube.