5" x 2" Polyon MaxRok Wheel Swivel Caster - 1000 lbs. Capacity b&p The source lists Stainless steel

The source lists Stainless steel roller bearing

Not ideal for drum sizes or constructions not listed for this model

Loads within the listed 440 lbs capacity

For more help choosing cabinet style

Cease-Fire receptacles provide around-the-clock protection against trash fires and are suitable for use in plants

5" x 2" Polyon MaxRok Wheel Swivel Caster - 1000 lbs. Capacity b&p The source lists Stainless steelProduct Overview Polyon maxrok wheels are made from a polyurethane elastomer tread bonded to glass filled nylon, providing incredible impact strength and a fairly high load capacity for the weight and price. The elastomer tread provides some floor protection, making these wheels great for concrete and warehouse applications. The nylon compound is resistant to grease, oil, and most chemical and cleaning solutions. Tread: Polyurethane Elastomer