Features High Quality 5V 1-Channel Relay Module: This module offers high-quality performance with a 5V power supply and 1-channel bistable self-locking relay, ensuring reliable and efficient . Convenient Trigger Control: Easily activate the relay by clicking the trigger port to pull it in and hold, and click again to disconnect, providing convenient and intuitive control. and Long Service Life: Constructed with high-quality materials, this relay module is and has a long service life, ensuring lasting reliability for your applications. High Accuracy and Strong Stability: With high accuracy and strong stability, this relay module is easy to install and use, delivering and reliable performance for various applications. Safe Low Pulse Trigger: The trigger mode is a low pulse trigger, providing a more convenient and safer for your peace of mind. Features: 1、0.06in thick piston ring, embedded in the piston grooves to scrape the excess oil on the cylinder. 2、It is widely used in agriculture, fishery, animal husbandry, aquaculture, forestry, etc. 3、Made of superior iron material, high hardness, anti？corrosion and , long lifespan. 4、Easy to install, does not require complicated s, convenient for using. 5、Original standard, direct replacement for the old or damaged piston rings, reliable to use. Specification: Item Type: Piston Rings Material: Iron Thickness: Approx. 1.5mm/0.06in Model: 190F Purpose: Embedded in the piston grooves to scrape the excess oil on the cylinder Application: Used in agriculture, fishery, animal husbandry, aquaculture, forestry, etc. Package List: 5 x Piston Rings Package List 5 x Piston Rings