Kit is required for use with Sidewinder rotating turret RP61300 if the pin box on your trailer measures 12-1/2". Pin boxes that meet this criteria include Fabex 500, 503, 520, 530, 560 and 765; Lippert 0115, 1116 and 1716; and RBW 7019 and 7028.

If your camper has a wide pin box wingset, this spacer kit ensures a snug fit when installing a 20K Sidewinder fifth-wheel king pin.