Tight Air Tightness The piston ring provides a secure seal between the piston and cylinder wall, effectively maintaining air tightness during operation. Easy Installation Designed with standard inner and outer diameter sizes for easy installation and removal, simplifying maintenance. Material Made from sturdy aluminum, the ring is from casting defects such as cracks, pores, and looseness, ensuring a tight and secure connection for performance. Replacement Rings Included The kit includes 3 or 4 replacement piston rings, enabling replacement of old or damaged rings on the air pump for continuous operation. Practical use scenarios Routine maintenance on air pumps and pneumatic devices to restore sealing performance and efficiency. Servicing use equipment in workshops or manufacturing environments to extend tool life and reduce downtime. Keeping spare parts on hand for compressors or air pumps in household or professional settings to ensure quick replacement when wear occurs.