Aluminium self-supporting extension ladder cat. No. Dms7730 height available : 14ft to 40ft made aluminium alloy ‘c' section 66.00mm x 31.00mm and steps 25.4mm dia non slip corrugated tubing fitted & operate with (nylon) polypropylene rope pulley arrangement it with bracket, lockable stoppers, non skid solid rubber shoes and caps. *foldable type ladder. It can locks at any required height and adjustable.