Cast Iron V-Groove Wheel 6" x 2" with 3/4" ID Bearing; Optional Spans to 1/2" ID 6" Diameter x 2" Wide with 1/2" ID V-Groove (One) Wheel 620VS64 V-Groove 3/4" 90 w/ 1-1/2" Side (1/2" Groove x 13/32") (One)