ESSENTRA ROUND END CAP SHORT LDPE BLUE

It's made from LDPE, which is a low-density polyethylene plastic. The blue color on Essentra caps like this one is typically used to help distinguish cap sizes or types during assembly and storage, so pulling the right cap off a shelf or out of a bin goes a lot faster when you've got multiple sizes on hand.

This end cap is designed for round tubing with a specific outer diameter to ensure a snug fit and prevent it from easily falling off. Check the product dimensions to confirm compatibility with your tubing.

For protecting an open end and giving it a clean finished look, this round end cap is a good fit. It is a short blue cap made from LDPE, so it is meant to cover the end rather than act like a plug for sealing or pressure holding.