Gowe&reg; Barcol Impressor Portable Aluminum Alloys Hardness Tester Meter Indenter:26 panhead cone, head face diameter 0.176mm Testing Range: 0~100HBa,equivalent to 25~150HBW Resolution: 0.5HBa Indication error: hardness range 42~52HBa, +-2HBa hardness range 84~88HBa +-1HBa Repeatability error:hardness range 42~52HBa, +-2HBa hardness range 84~88HBa +-1HBa Net weight: 0.5kg ***Don't buy others' fakes. Only buy from Gowe Industrial can enjoy after-care service.***