Check the listing for details. AquaChek Select Connect Kit Refill 541640 (50 count). Condition: New. Listed at 17.99 USD. The AquaChek Select Connect Kit (541640) Refill is ideal for those who have already purchased the AquaChek Select kit and just need additional test strips. Each 50-count refill bottle contains 7-in-1 test strips and a color chart for accurate results. Test your pool or spa water a minimum of twice a week for best results. Get precise and reliable results quickly and easily! Tests for: total hardness, total chlorine, total bromine, free chlorine, pH, total alkalinity, and Cyanuric acid. SHIPPING: We will do our best to ship your order based on the shipping method selected, however in some cases, your shipping method may need to be modified to meet shipping requirements based on the carrier. Our current carriers used are UPS, FedEx and USPS. Please contact us directly through the "Contact Seller" link if you need UPS, FedEx or USPS specifically for your order.