4" Swivel Caster - V Groove Wheel - Model G15 G15VL4x2-S Price:$39.73    Each 500 Lb. Maximum Capacity Each 4" V-Groove Wheel. V-Groove swivel casters require a Swivel Lock in order to go backwards when on Angle Iron Track. Home | Application Tips | Standard Products - Casters and Caster Wheels | Warranty | Summary | Contact Us Casters - Helpful Tips | Special Products - Casters and Caster Wheels | Web Resources | Site Map Photos & graphics are for informational purposes only. Actual product may vary slightly from those shown. Wheel colors may vary unless specified. If wheel color is important, please contact us for current inventory.