Specialty Stack It Peep Verifier Lens Silver #4 1503707. Constructed from glass and engineered for clarity it integrates with Stack It components while allowing removal for easy cleaning. Optical Centered Technology improves lens alignment to reduce image shift and Protected Lens Technology secures the lens to help prevent damage. Multiple strengths are available to match individual visual needs. Specifications for Specialty Archery Specialty Stack It Peep Verifier Lens: Manufacturer: Specialty Archery Color: Silver Features of Specialty Archery Specialty Stack It Peep Verifier Lens: Verifier lens for Stack It peep systems Enhances visibility of sight pins Glass lens construction Removable from aperture for cleaning Optical centered technology reduces image shift Protected lens technology with dual-side support Strength range from #4 (weakest) to #9 (strongest) Package Contents: Specialty Archery Specialty Stack It Peep Verifier Lens