The Glow Ring is for use with our 1 5/8" Black Super Scope Housing. Pins are available in blue, green, and red colors and in .010, .020 or .030 fiber sizes. Specialty Archery uses high quality Super Flex fluorescent fiber for brilliance. Take into consideration the pin size when ordering, if you use a clarifier. Clarifiers clear up the target, but can fuzz up your pin. When using a clarifier we recommend using a larger pin size. For use with the 040-1BLK Super Scope..020 GREEN