Specialty Archery PXL Hunter Peep Aperture 3/16 in. Black. Features include deep perimeter groove for added security center string alignment for perfect centering on string eliminating left to right inconsistency and a tool-less design making changing apertures as breeze. Weighs 30.5 grains Specifications for Specialty Archery PXL Hunter Peep: Manufacturer: Specialty Archery Color: Black Features of Specialty Archery PXL Hunter Peep: Dual string angles (37 and 45 degrees) Accepts PXL apertures and peep shade cap Deep perimeter groove for added security Center string alignment for perfect centering on string Tool-less aperture installation/removal Package Contents: Specialty Archery PXL Hunter Peep Specialty Archery PXLHA187: PXL Hunter Peep Aperture 3/16 in. Black