Cast Polyurethane Sheet, 90 A Durometer, Dark Blue, 1/4" x 6" x 6", Tolerances listed as follows: Length: +1/4″ / – 0 Width: +1/4″ / – 0 Thickness: + / – .010″ or 2% (whichever is greater) Polyurethane Precision Cast Sheet Our precision cast urethane sheets meet the highest industry standards. Advantages of urethane sheets include Abrasion Resistance, Noise and Vibration Dampening, Cost Effective, Lightweight, High Load Bearing Ability, Temperature resistance (up to 200F), Strength, Impact Resistance. Here are a few of the industries we serve: Aerospace Manufacturing Prototyping/engineering Marine Military and defense Food service and prep Insulation and weatherproofing Automotive