Darnell Superior quality casters.
Excellent for schools, churches or any facility that moves pianos frequently.
Single Rubber-fibre wheel. Features heavy duty, double ball-bearing swivel. The upper row carries the load weight, and the lower row takes up all the side thrust.

Darnell single wheel piano casters are equipped with four sided double ball raceways.
Wheel Diameter: 2"
Wheel Width: 1"
Wheel Material: High Capacity Neoprene
Load Capacity ea: 125 lbs. (375lbs total for Grands or 500 lbs total for Uprights)
Height w/o stem: 3"
Stem Dimension: 1/2" Dia x 1-1/8" Long

591A - Grand Set of 3 - $133.35
Supplied with removable, square CP-2C cast-iron sockets with 4 screw holes.
OD: 15/16"
ID: 1/2"
Height: 1-5/16"
Screw Space: 1-3/16" (Shortest)
1-11/16" (Farthest)
Track Plate Thickness: 1/4"

591 - Upright Set of 4 - $155.15
Supplied with removable, round CP-1C cast-iron sockets with 4 screw holes.
OD: 15/16"
ID: 1/2"
Height: 1-5/16"
Screw Space: 1-3/16" (Shortest)
1-11/16" (Farthest)
Track Plate Thickness: 1/4"