Don’t let changes in your vision compromise your ability to make the shot. The Verifier has a lens in it similar to those found in reading glasses. Allows you to see your sight pins better on your hunting sight. The Verifier lens sharpens the picture so pins are easy to see. The Large Verifier fits in the Large #749-37L or #749-37LH Peep using the 210078 Dual Aperture Wrench (sold separately). The Large Verifier (with approximately a 3/16″ field of view) is available in #4 (Silver), #5 (Purple), #6 (Pink), #7 (Blue), #8 (White) or #9 (Orange). #4 is the weakest, #9 is the strongest. The peep should be inserted in the string so the side with the verifier, clarifier, or aperture is on the side you look through. We recommend Lens Brite Anti Fog Lens Cleaner (#641), Lens Cleaning Swab (#501) or Premium Lens Cleaning Swabs ((#502), and Clarifier and Verifier Cleaning Vial 10ml (#SA-CV) for cleaning the lenses. Protect your peep from dust, debris and moisture with the Peep Guard (#PG1-BLK or #PG1-RD). NOTE: Not compatible with PXS Peep, Podium Peep™, or PXLH Hunter Peep. Dual Aperture Wrench (#210078) needed for inserting Verifier into your peep. Large Peep and component weights: Large Non-hooded Peep – 12.5 grains Large Hooded Peep – 15.0 grains Large Clarifiers/Verifiers – 5.5 grains Peep Reducer (#753-3)- 3.1 grains Peep Reducer with 1/8″ Clarifiers/Verifiers inserted- 7.1 grains Large Peep Aligner (#PAL)- 15.0 grains CAUTION: High powered bows create a great amount of vibration. This may loosen Verifiers, Clarifiers and Apertures over time. Tighten your Apertures before each use. If you hear a buzzing sound, this indicates a loose Aperture. You may use a drop of Vibra-Tite VC 3 (#VC3), Teflon tape, bow wax, or any other non-permanent binding agent on the threads.