The Glow Speedring for Norman LH2400 series strobe heads, with 144mm Insert, is a precision aluminum alloy adapter with steel components, featuring durable construction. The speedring has been carefully fashioned to mount quickly onto your flash head. The rim has holes for up to 16 rods from the light modifier of your choice, accommodates any-sized soft box, eliminating the need to buy different connectorsolutions. The insert allows softboxes and other modifiers to rotate to any angle. This speedring does not fit onto Norman monolights..