When ordering this effect wheel design first choose which type you require. Plastic for the Solar 100C, Solar 250 or GoBoShow. Glass for higher powered OPTI GoBoPro and K4 projectors. Then place your order using the appropriate code and ensure that you specify which projector you are using (e.g. GoBoPro or Solar 250) and that any other variables are noted. For instance, if the wheel is being front or rear projected or via a mirror.