TEST PAPER PH 1-12 , Pack of 5.

Details:

Hydrion 1-12 Ph Paper Refills^ 5 Rolls. Measures Ph'S 1-12. For Standard Size Single And Double Roll Dispensers. Refill Rolls Are Packed In Heat Sealed Aluminum Foil And Tightly Secured In A Plastic Case And Includes Two Color Charts. Shows Distinct Change For Each Full Ph Unit.