The WEBSTER® Model B Hardness Tester, P/N: B, is designed to cover the hardness of aluminum alloys from the 1100 to the 7075 series. The 20 graduations on the WEBSTER® dial indicator cover the range between 25 and 110 on the Rockwell E Scale. The WEBSTER® Model B Hardness Tester 'standard configuration' ships with a 3/8" anvil and 1/4" jaw capacity. Other custom anvil and jaw capacity configurations are available, please contact us for a quote. Each tester is shipped in a fitted case with a spare penetrator, adjusting wrench and standard test strip.