These 4 in. caster wheels are designed for commercial kitchen prep and work tables, and other tables with 1-1/2" diameter opening. The 4-inch diameter offers a balance between maneuverability and load-bearing capacity, each wheel can support up to 300 lbs. making them ideal for various kitchen setups. This combination of durability and design excellence ensures that Kutler's caster wheels remain a reliable choice. In addition to their durability, these caster wheels provide smooth and effortless mobility across different floor surfaces. Whether the flooring is tile, concrete, wood, or vinyl, these wheels glide seamlessly, reducing the extra effort required to move heavy tables. The smooth mobility offered by these wheels ensures that kitchen staff can quickly and safely reposition tables as needed. Kutler's caster wheels also prioritize safety and ease of maintenance, crucial aspects in any commercial kitchen. 2 of the wheels are equipped with a reliable locking mechanism to prevent unwanted movement, ensuring stability during food preparation. Additionally, these wheels are designed to resist common kitchen contaminants like grease, water, and food particles, making them easy to clean and maintain. This ease of maintenance helps ensure the wheels remain functional, supporting the high standards required in commercial food preparation environments. Overall Dimensions: 7-3/4 in. tall (this will raise the table by 5 in.), 5-1/4 in. wide Wheel Diameter: 4 in. Color: Silver. Material: Steel.