Sliding Piston Petra 800 / HT135This replacement sliding piston is designed specifically for the Petra 800 & HT135 pedicure massage chairs, ensuring precise fit and smooth operation. Engineered for durability and reliable performance, it supports the chairs mechanical movement system, helping maintain consistent function and client comfort. Ideal for repairs or maintenance, this part restores proper operation to keep your pedicure spa chair performing at its best.