The accuracy molded construction resists and wear, making this set a cost effective upgrade for extending equipment service life Ideal for mechanics, maintenance professional, and craft enthusiasts working with hydraulic systems or industrial machinery Featuring a robust design and hassle release installation, each oil cup delivers secure sealing and efficient operations in demanding conditions Designed for workshop and factory applications, these oil cups leaks and maintain optimal lubrication in high pressure equipment and automotive tools Crafted from sturdy, this 2 piece oil bubble assembly set ensures long time and a perfect fits for 139 tube models, Manufacturer: JDNH