Swell Type and Height and Cantel Height Traditional Barrel Racer - Rounded Swell, 3.5" Horn, 5.5" Swell Height & 4.5" Cantel Height Standard Barrel Racer - Rounded Swell, 3.5" Horn, 6" Swell Height & 5.5" Cantel Height Cutout (Safe Swell) Barrel Racer - 3.5" Horn, 7" Swell Height & 6" Cantel Height