This part fits on 7" Steel, 8" Steel, 8" Resin, 9" Steel (2010 and newer) or Mirage frames. This is a newer style of joint which utilizes a 5/8 inch rail (or track). It measures 5" 7/8" wide by 4" deep. This is a lower joint, meaning it only can be used along the bottom of the pool near the ground.
