Sawtooth Outdoor Products Peep It 3/16 in Purple 3/16. So when you draw the bow the elastic tube will stretch and align the aperture to a perfect perpendicular stance so you can see through the aperture. This Serve-less Peep It also installs in seconds and doesnt move yet can be micro adjusted without a bow press. Specifications for Sawtooth Outdoor Products Peep It: Manufacturer: Sawtooth Outdoor Products Archery Application: Archery Package Contents: Sawtooth Outdoor Products Peep It Sawtooth Outdoor Products 759740006390: Peep It 3/16 in Purple 3/16