Pillowball spacer mounts are designed to space the camber plate off of the bag so that when it flexes, the camber plate does not come in contact with the bag itself. This 18mm tall version is best used when converting your BC BR Type Coilovers to air with the OCD Single Bellow Bags or the OCD Sleeve Style Bags. BC Racing BR Type coilovers have two different rod sizes (12mm and 14mm) so be sure to measure the rod diameter of your coilovers before purchasing these pillowball mount spacers.