This pack of 100 O-rings measures 1-3/8 x 1-5/8 inches and is manufactured by Double HH Manufacturing. These O-rings are made from high-quality rubber, providing excellent sealing capabilities for a variety of applications. They are ideal for use in hydraulic systems, plumbing, and automotive applications, ensuring leak-proof connections. The durable material is resistant to wear and temperature fluctuations, making them suitable for both indoor and outdoor use. Stock up on these essential components for your maintenance and repair needs.