These bushes come as sleeve and flanged type bushes. A solid sleeved bush is only a “sleeve” of material with O.D., I.D. and length. This type of bush is solid all the way around. A flanged bushing is a sleeve bushing with a flange at one end extending radially outward from the OD. The flange is used to positively locate the bushing when it is installed or to provide a thrust bearing surface.