Product number: 100501 High quality RFi Speedrings are used for mounting RFi Softboxes. Its design allows you to snap it onto the softbox without having to touch or bend the ribs, while the color codes show you exactly how to assemble the unit. Profoto 's classic rubber locking collar makes it easy to mount the RFi Speedring on the flash. Our RFi Speedring adapters allow RFi Softboxes to be compatible with all brands of speedlights and their range spans the gamut from professional speedlights to high quality studio strobes. Even if you own flashes from different manufacturers, now you only need one brand of softbox. Characteristics Allows you to mount RFi Softboxes on Profoto flashes or flashes from other flash manufacturers. Color-coded holes allow for quick and easy installation. It has been painted with heat resistant lacquer. Allows the softbox to be rotated 360°. It has been designed to last many years with daily use.