9090 Size: 1-3/8" Features: -Carpet base caster cup.-Material: Metal.-4 Per card.-Round shape.-Used to protect hard floors from scratches and dents. Dimensions: -1-3/8" Dimensions: 4.56" H x 3.63" W x 1.38" D.-2" Dimensions: 5" H x 4" W x 2" D.-2-1/2" Dimensions: 7" H x 4.75" W x 2.5" D.