The Metro HDC3BB Super Erecta® Stem Caster features a durable 2-1/2" diameter design, crafted with a black nylon housing and a non-marking polymer tread. This swivel-brake caster is equipped with donut bumpers to protect surfaces and enhance maneuverability. It easily attaches to standard shelving posts and supports a weight capacity of up to 100 lbs, making it ideal for various storage and transport needs.