Peroxide Detection Test Strips, Description/Special Features Test Strips Used to Detect Peroxides in Organic Solvents and Aqueous Solutions, 0-50, 50-100, 100-250, 250-350, 350-500 ppm, Number of Tests 50, Operating Temp. Range 0 Degrees to 50 Degrees C, Form Test Strips, Length 2-1/2 In., Width 1/4 In., Size 50 Strips, Shelf Life 9 mo., Package Quantity 50