pH-Fix 4.5-10.0 PT indicator sticks in round plastic tube with snap cap measuring range: pH 4.5-5.0-5.5-6.0-6.5- 7.0-7.5-8.0-8.5-9.0-9.5-10.0 pack of 100 sticks 6 x 85 mm Special conditions for medical devices apply.