Aqua Chek 511242A Free Chlorine Test Strips - Yellow Sku: AQU-511242A-HZ91 This is a brand new part comes with a full manufacturer warranty!!! This sale transaction is for only this part number: 511242A These Aqua Chek Yellow test strips from Hach will test your pool and spa water for free chlorine, pH, total alkalinity and cyanuric acid. Just dip a strip into the water for one second, and remove immediately. You'll have your test results in 15 seconds. To keep your pool at its best, test at each end of the pool at least twice a week, and test your spa before each use. Bottle contains 50 test strips. Instructions included in 15 languages. TERMS OF SALE: If, after receiving this item you discover that it was not the one you wanted, simply return it for a full refund within 14 days. You will have to pay for the return shipping charges. Refund is void if you have installed, used or damaged the item in any way. Item must be returned with its original box, packing materials and instructions. Payment via PayPal must be received within 3 days of transaction and prior to shipping. SHIPPING: Shipping charge will be based upon location. Please use the shipping calculator or request a shipping quote. International buyers: Customs fees, duties, taxes, tariffs other fees are your responsibility. Arrival time will depend on your location. If you have any questions, feel free to ask. Thank you for visiting! Weight:0.8~SCID:20729~Dimension:9x6x6