Temperature Range: Available on High Temperature specified wheels -30°Fto+70°F. Axle: Wheel sizes 2”, 3” and 4” use 3/8” diameter axle with lock nut. Color: Black is standard, other colors available Blue and Red. Use: Ideal for food service equipment, hospitals, laundries, dairies, bakery racks, corrosive environments, etc. Application: Originally designed for light duty tool carts, Floor protection, shock absorbent, smooth rolling. A wide variety of stem casters in light, medium and heavy duty are also available.