PolarStar O-Ring set for JACK (MP7 Excluded

The PolarStar O-ring set for JACK is a complete service kit designed for maintenance, repair, and replacement of worn seals in the PolarStar JACK system. It is intended for all JACK versions except the MP7 variant and helps restore proper sealing, reliable operation, and consistent performance.

Regular replacement of O-rings is important for smooth system operation and long-term reliability. The package also includes a plug screw, giving you a practical service kit for routine maintenance and repair.

This set is a great choice for PolarStar JACK users who want to keep the correct replacement seals ready for quick servicing and reliable system function.

Package contents:

• 1x M1.5 × 6.5 (Buna 70) – Front Outside of Nozzle
• 2x M1.5 × 9.5 (Buna 70) – Rear Outside of Nozzle
• 1x M1.5 × 19.5 (Buna 70) – Thread Relief of Front Cylinder
• 1x M1.0 × 18.5 (Buna 70) – Captured Between Front Cylinder and Donut
• 3x M1.0 × 5.0 (Buna 70) – Two on Nozzle Stem & One Inside of Nozzle
• 1x M1.0 × 2.5 (Buna 70) – Plug screw on bottom
• 1x M1.0 × 4.5 (Buna 70) – Barb Fitting

Key features:

• Complete O-ring set for PolarStar JACK
• Designed for all JACK versions except MP7
• Service kit for maintenance and repair
• Helps restore proper system sealing
• Includes Buna 70 seals
• Plug screw included