Kolbel Retractor Set w/4-blade. 1Kolbel Retractor Frame only. 2Kolbel Blade, 36 x 36 mm. 2Kolbel Blade, 36 x 53 mm. Premium Grade Stainless Steel. Brand New Excellent Products. All of Our Products Are Unconditionally Guaranteed Against Defects In Material And Workmanship. The sale of this item may be subject to regulation by the U. Food and Drug Administration and state and local regulatory agencies.