8" Size Strap: 8" L x 1-1/2" W Vertical Mounting Plate: 5-1/4" L x 1-7/16" W 35 lb per pair 12" Size Strap: 12" L x 1-1/2" W Vertical Mounting Plate: 5-3/8" L x 1-1/2" W 60 lb per pair 18" Size Strap: 18" L x 2" W Vertical Mounting Plate: 6-1/2" L x 2" W 90 lb per pair 24" Size Strap: 24" L x 2-3/16" W Vertical Mounting Plate: 6-1/2" L x 2-3/16" W 150 lb per pair 30" Size Strap: 30" L x 2-1/4" W Vertical Mounting Plate: 8" L x 2-3/16" W 200 lb per pair