Military chock block for wheeled vehicles. All-steel construction, fully welded. Wide, flat bottom for easy placement under large tires. 11.25 x 11.5 x 5.5 inches in size. Painted OD Green. 13lb shipping weight. Includes one chock block with a 4-foot steel chain, but does NOT include a clip or hook to attach it to a vehicle. This chock block is BII (a Basic Issue Item) for the M872A3 34-ton trailer, quantity 2 required per trailer, in accordance with TM 9-2330-359-14P. SOLD AS 1EA (ONE CHOCK BLOCK), NOT ONE PAIR. P/N 10869550, NSN 2540-00-769-5048.