I have many front casters, 4 inch 5 inch and 6 inch one pair that fits tight and the rest will fit every other wheel wheelchair. There’s only one pair that’s used. That’s the blue one but it’s a very good condition that one I can let go for $75 for the pair. The rest are 120 because they’re brand new and I have one said that it’s 4 inch 1 inch if you’d like the Skinny size the rest are 4 inches5” and 6 inches and the wideness is one and a half inch wide