Two Wheel Privacy Cubicle Carrier or Roller with Hook. This style carrier is not compatible with any of the hospital tracks offered on Curtain--Tracks.com. These carriers or rollers are offered as replacement parts for those with existing tracks in place. The white plastic body is round, and offers a swivel and plated steel hook. 14/bag. Dimensions: Axle length .92 in, Wheel Diameter .54 in, Total height 2.5 in. Hook 1.4 in tall x .67 in wide. Hook opening .15 in. Not compatible with track 88001. Fits a track that is 1.12 in wide x .75 in tall.