Winterizing chemical kit for pools up to 24,000 gallons. All chemicals in this kit are in concentrated powder form. It keeps this kit light and easy to use. There are no heavy or messy liquid chemicals to add, nor is there anything to tie up or float. This kit allows you to add your chemicals and close you pool all within 1-2 hours. Winter kit contains 2 Lbs. Winterizer, 2 Lbs. Sequestering Agent (prevents stains), 2Lbs. OxyPlus Shock.