Wing Industries brand Little Giant multi-use ladder model M17 #10102, Type 1A, Plank trestle model #10069, Leg Leveller model #106, and work platform attachment. Ladder is made of 6005-T5 aluminum, 37 lbs., rated 300 lb. workload. Many configurations--A-frame, extension, 90 degree, staircase, trestle and plank. Telescopic design, triple-locking hinge, wheels for ease of transport.  Extension setting height is 9 ft. to 15 ft., A-frame 4 ft. to 7 ft. The Plank is an adjustable platform for converting multi-position ladders into scaffolding systems. NOTE: for Plank use with ladder, trestle brackets are sold separately and NOT included.  Adjustable length 6' to 9', aircraft-grade aluminum, 32 lbs. total weight, 250 lb. workload. Rung locks, slip-resistant 12" wide standing surface, compact storage. Dimensions are 1 ft. x 2" x 6 ft. All items appear in good used condition. See photos for more detail.