This is a complete brake shoe box kit for heavy-duty applications (likely commercial trucks or trailers). The kit includes two brake shoes with 23K lining material, plus a hardware kit with springs, pins, clips, etc. - everything you need for one axle end. Specification: 4707, 16-1/2 x 7, Q+ (Q Plus). Manufacturer part number: H-21407. Brand: ALPAR. Type: Shoe Box Kit. New in original packaging. If you're replacing worn brake shoes on a truck, trailer, bus, or other large vehicle, this kit makes the job easier because you get all the parts together. The 23K lining is a common specification for medium/heavy friction. Always check compatibility with your specific vehicle make and model before ordering. Saves you time hunting for individual components. A quality replacement part that helps ensure safe, reliable braking performance. Essential maintenance for keeping your big rig on the road safely. Order your kit today!