I have 4 different types of casters, set #1-(8) 2 sets =1/4"compresion stud-1/2"x1 1/2" wheel; #2-(4) flat plate 2 1/4"x2 1/4"x1 3/4" plastic wheels (2) swivel w/locks (2) fixed; #3-(4) .2965 friction shaft x 1 1/2"x2" locking; #4-(4)3/8" stud x 1 1/2"x2 5/16" locking. Give Tux a call @ 651 7zero7 6920. Thanks Price is per set