Four-inch orange casters are widely available and typically feature durable PVC material, used for medium to heavy-duty applications on carts, equipment, and workbenches, often with swivel/rigid options and brakes for easy, quiet movement and floor protection.

Key Features & Types

1. Material: Most commonly made from orange PVC for non-marking, quiet, and durable rolling.
2. Mounting: Available as swivel (for maneuverability), rigid (straight movement), or combo sets.
3. Brakes: Often come with side or total-lock brakes for securing equipment.
4. Bearing: Often feature ball bearings for smooth rolling. 

Ideal for various industrial and commercial applications including equipment, furniture, shelving units, carts, trolleys, and material handling equipment where reliable mobility and secure positioning are essential.