1. Compatible Models: This Oring is suitable for Custom Molded Products (CMP) Powerclean Ultra Chlorinator, Powerclean Mini Chlorinator, and Powerclean Ultra Offline Chlorinator. It is not compatible with the Powerclean Ultra Cell model. 2. Sealing and Protection Function: Replacing a damaged Oring in a timely manner helps maintain the seal between the pool cleaner lid and connecting parts, preventing water or air leakage, and stopping contaminants from entering the cleaner. This protects the internal components of the equipment, maintains the normal operation of the suction or filtration function, and extends the lifespan of the equipment. 3. Material: This Oring is made from durable rubber material, ing effective sealing performance to help prevent water and air leakage while maintaining a tight connection between parts. Additionally, the Oring has good corrosion resistance and compression strength, allowing it to withstand longterm use and pressure, making it suitable for a variety of environmental conditions. 4. Size Specifications: The Oring has an outer diameter of 41/2', an inner diameter of 41/8', and a crosssection of 3/16'. These dimensions meet the standard size requirements for various models and are suitable for replacement and installation.