The ALPHA High-Performance Lumbar Support Belt. Size: Extra Large. Diameter: 48in (122cm) x 56in (142cm). Alpha® introduces a new Lumbar Support Belt. It has high-performance elastic straps help relieve pressure on the lumbar spine as well as reflective stripes on suspenders and waist giving the belt enhanced visibility in the work area. It is recommended for Warehouse Employees, Construction Workers, Hardscapers, Landscapers, Bricklayers, Stone Fabricators, Tile Installers, Countertop Installers, Movers, Carpenters, and Truck Drivers.