Reduce Chemicals Usage: This is a highly effective cartridge for Dimension One spas to purify spa water. Mineral purification is a natural process that effectively and consistently improves water quality without the overuse of excessive hot tub chemicals. It helps maintain balanced chemical levels and can be used with a hot tub ozone system for a more comfortable spa experience. Perfect for Dimension One Spas: This vision cartridge is designed specifically for the Vision cleaning system in Dimension One spas. It utilizes the water flow through the D1 water management system to reduce chlorine odor and keep the hot tub clean, providing crystal clear, odor-free water for an enjoyable bathing experience. Lasts Up to 6 Months: This cartridge lasts up to 6 months. Use the Date Ring to track when replacement is needed. With minimal maintenance, it helps keep spa water cleaner for longer periods, up to 6 months. Natural & Safe Material: This hot tub filter shell is made of high-quality ABS material. Reduce Skin Irritation: This replacement cartridge helps continuously improve water quality as the filtration system circulates water through the spa. The mineral-based purification is gentle on the skin, offering a comfortable and soothing experience similar to that of a natural spa. Color: Purple Material: ABS Package Contents: 2 x Spa Filter Cartridges for Dimension One Spa Note: Light reflection and different display settings may cause slight color variations between the product image and actual item. This does not affect functionality or performance. Measurement allowance: +/- 1-3 cm.