View cart “6″ White PD Ruler” has been added to your cart. Previous Product Next Product Prescription Aligner $79.50 Prescription Aligner quantity Add to cart SKU: 6621205 Categories: All Exam Supplies, Best-sellers, Fees products, Products Tags: Exam Supplies, Exam Tools Description Description Verify seg heights and center of vision placements for accuracy and positioning. Easy to use Convenient size Related products Quick View Quick View 6″ Clear PD Ruler – Unit $2.40 Add to cart Quick View Quick View 6″ White PD Ruler $6.55 Add to cart Quick View Quick View 6″ Stainless Steel PD Ruler $3.65 Add to cart