Magnetic Jet Head Replacement for Luraco Jet Motor,Pedicure chair parts with Pipe-less Whirlpool System Pedicure Spa. water jets for bathtub Dimension: Front Head 3 3/8 Diameter and Back Head X 3 1/8. Replacement for Pedicure spa chair partmagnetic head uses magnetic coupling technology,no shaft seal, will never leak. The Magnet-jet be easily clean..