High quality cart casters for Greenlee GMX carts. Listing is for a set of four (4) Service Caster Series #30 casters with 4 inch diameter by 2 inch wide phenolic wheels. Set includes four (4) swivel casters. Supports 3,200 total pounds (lbs) at 800 pounds (lbs) per caster. When searching for a reliable and durable solution to your Greenlee replacement caster needs, consider Service Caster Series 30 top plate phenolic wheel casters. The Service Caster Series #30 features phenolic wheels that maintain heavy loads without deformation or flat spots. Finely crafted with a bright zinc plated finish and heat-treated ball bearing raceway, these Service Caster high performance Greenlee replacement casters offer industrial grade phenolic wheels that are best used on smooth, flat, and clear industrial or commercial settings where materials may be stationary for long periods. Phenolic resin wheels are highly resistant to impact damage, providing protection for floors in commercial and industrial settings. Not only are they resistant to water, oil, and grease, but because they are non-metallic, these wheels are spark proof, keeping you safely moving forward. These versatile casters are ideal for a wide range of applications, but are commonly used on Greenlee GMX Carts. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward.