ASTM G121 Metal Test Coupons

Metal test coupons as described in ASTM G121 (Standard Practice for Preparation of Contaminated Test Coupons for the Evaluation of Cleaning Agents). The test coupon material depends on the end-use application for the cleaning agent being tested. Each coupon is 1.97" x 3.94" x 0.032" (5cm x 10cm x 0.8mm) and has a 0.248" hole centered at one end.