Impact Jumbo Plus Sight. The Impact Archery Jumbo Plus sight has a single pin 2 1/4" aperture and micro elevation adjustment. It includes a laser etched scale. Exclusive 2 1/2 feet of .030" light gathering fiber optic. Collects and directs every bit of available light to the tip of the pin to make the critical shot at low light conditions LEGALLY possible. CNC machined aluminum components. Rotate the Cosmic Ring to have 4 different up donw, right and left pin positions. Patent Pending. Impact Model # NI-161P. The Impact Archery Jumbo Plus.