This is a single, generic metric oil seal with the dimensions 45mm x 68mm x 12mm. The 'double lip' design means it has two sealing edges to keep oil in and dirt out more effectively. It's a brand new, essential component for repairing all sorts of machinery – think gearboxes, pumps, motors, automotive applications, or industrial equipment where a shaft rotates inside a housing. Always check your old seal or the housing specs to confirm these are the exact dimensions you need (45mm inner diameter, 68mm outer diameter, 12mm width). A small, inexpensive part that can prevent big leaks and costly damage. Keep a few on hand if you work on engines or machinery regularly. Simple, but crucial for proper operation.