Ring for Crux and Crux-in lamps made entirely of plastic, to be durable and easy to handle. Its color is a polished metallic gray, which resembles the appearance of aluminum and also of satin nickel. In the packaging, it brings 6 ready units for use with lamps. Its outer circumference is Ø65 millimeters in total, in order to fit perfectly with Crux lamps, its inner circumference is Ø59.4 millimeters. They also include two screw holes at two opposite ends, each 45 millimeters apart. And a total thickness of 16 millimeters.