Adjustability galore—1st and 2nd axis adjustability, individually micro-adjustable pins, Inch Wheel micro adjustment, and an adjustable level. Five micro-groove pins with .019" fibers. Black Gold’s new interchangeable fluorescent rings for quick and sure peep alignment even in low light. PhotoChromatic Technology; SkyCoil gathers all available light. Color: Black. Right hand only. Manufacturer model #: FPSU5.