Zebra Skimmers: Hardness Testing Sticks

Monitor coolant chemical condition with these hardness testing sticks. 

• Easy-to-use: Dip into fluid and compare your color reading to hardness (ppm) value color chart on bottle label
• Results in 3 seconds
• Range of 0-1000 ppm calcium and magnesium
• 50 sticks per bottle
• One bottle lasts a year per sump