HFBTE Leeb Hardness Tester Meter Gauge Leeb Hardness Testing Equipment for Steel Cast Steel Stainless Steel Aluminum Alloy Brass Copper Bronze Etc HLD HL HB HRB HRC HRA HV HS
- Water hardness is caused almost entirely by calcium and magnesium ions.
- Hardness test kits include the inexpensive Models 5-B and 5-EP.