9673 Stem Size: 3/8" x 1" Features: -Office chair twin wheel stem caster.-2" Wheel.-Stem 87 (3/8" x 1"), Stem 07 (5/16" x 1").-Package type: Carded.-Load capacity: 75lbs. Color/Finish: -Color: Black. Dimensions: -3/8" x 1" Dimensions: 6.56" H x 4.63" W x 2" D.-5/16" x 1" Dimensions: 6.56" H x 4.63" W x 2" D.