Quaternary Test Paper Refill, 0 to 400 ppm pH, 15' L x 0.21" W, 100 Number of Test
| Concentration | : | 50, 100, 200, 400 ppm |
| Length | : | 15' |
| Width | : | 0.21" |
| Includes | : | 2 Color Charts |
| Number of Test | : | 100 |