The details of the castor FC31: ModelSizeWeightDiameter(D)Height(H)Holes Range(mm)FC303"0.1857558L:56W:28We also have other castors: ModelSizeWeight(kg)Diameter(D)Height(H)Holes Range(mm)FC313"0.2257554.5L:54W:24FC424"0.3910076.5L:82W:40FC4205"1.012589L:80W:60FC434"0.3610076.5L:82W:40