Reduce Chemicals Usage: This is a highly effective for vision cartridge dimension one spa to purify your spa water. Mineral purification is a natural process that effectively and consistently improves water quality without the overuse of excessive hot tub chemicals. It maintains a balance of chemicals and can be used with a hot tub ozone system for a more comfortable spa experience for your guests. Perfect for Dimension One spas: This cartridge for vision hot tub filter is designed specifically for the vision cleaning system of the for Dimension One spa filter. It utilizes the water flowing through the D1 water management system to reduce chlorine smell, keep the hot tub clean, thus provides crystal clear, odor-free spa water to ensure bather's fantastic experience. Lasts Up To 6 months: This for vision cartridge dimension one spa lasts up to 6 months. Refer to the Date Ring to help you remember when to replace it. With minimal maintenance costs, it helps keep your water cleaner, and longer up to 6 months. Natural & Safe Material: This 01512-261 hot tub filter shell is made of high quality ABS material. Reduce Skin Irritation: This replacement for Dimension One spa filter works to continually improve water quality as the hot tub filtration cleansing soak circulates through the hot tub, and the hydrotherapy mineral vision cartridge is gentle on the skin, making you feel as comfortable as if you were in an all-natural spa Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you Colour:Purple Material:ABS Package Contents: 2 * for Dimension One Spa Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.