(50) Hydrion Test Paper Refill QKR-1000, Quat / Quaternary Ammonium, EXP 01/2026
New, never used. There is minor exterior wear from storage, including light scratches and scuffs. Expiration date listed on units is January 15, 2026. Test Paper Refill. Range : 0, 200, 400, 600, 800, 1000 ppm.