Standard Protective Curtain System The traditional curtain system combines the hardwearing flexibility of Ultraflex® protective products with a heavy duty track. The track can be manufactured in straight lengths up to 6000mm with the option of a selection of curved sections. Mounting brackets will be supplied to site conditions. The track is 35mm wide x 40mm high. The gap between the bottom of the track and the top edge of curtain is 40mm.