9510 Size: 2-1/2" Features: -Swivel plate and side brake caster.-Black rubber wheel.-Zinc plated hardware.-General duty.-Load capacity: 125 lbs (2"), 175 lbs (2-1/2"), 255 lbs (4"). Dimensions: -2" Dimensions: 3" H x 4" W x 2" D.-2-1/2" Dimensions: 5.75" H x 8" W x 2.5" D.-4" Dimensions: 4.88" H x 4" W x 4" D.