Star extension ladderself supporting ladder small wheel with jack is made out of tensile aluminium c section 66.6mm x 31.25mm x 3mm thick approx the steps are made out of non slip aluminium corrugated fluted pipe 25.4mm dia & 3mm thick. The pipes are riveted at distance of one foot between two steps. The ladder has a single sliding movement. A polypropylene rope of 10 mm thickness is provided for easy and smooth sliding of the ladder. The sliding movement of the ladder is controlled by means gravity pawls and pulley mechanism. A platform is fixed at 3ft from top of the ladder, hand rail, safety ring, tool tray, handels and 4 nos 6inches dia fiber wheels are provided 4 jacks. The ladder is hinged on both sides by aluminum l angle. A non skidding thick rubber shoes is provided at the bottom of the ladder. Available size:closed : 08ft, 10ft, 12ft, 14ft, 16ft, 18ft, 20ft, 22ft, 24ftextended : 14ft, 17ft, 21ft, 25ft, 29ft, 32ft, 35ft, 40ft, 43ft