Circle Brand Extendable Aluminum PlankEasy sliding motion, with heavy duty spreaders. 250 lbs. load limit. Meets or exceeds OSHA and CSA standards. 12" wide. 250 lb. load limit Meets or exceeds OSHA and CSA standards 12 wide Easy sliding motion with heavy duty spreaders Designed for use with type 1 or 1A aluminum benches as well as stepladders Positive stops on the plank prevent overextending set at 12 increments Available in 4 sizes 6 to 9 (ST0715), 7 to 11 (ST0716), 8 to 13 (ST0717),