![Polyethylene .017" x .030" Polyethylene .017" x .030"](https://cdn11.bigcommerce.com/s-ye27j2homb/images/stencil/500x659/products/13146/4066368/mre__04311.1719628445.jpg?c=1)
Polyethylene is a relatively rigid polymer suitable for short-term catheterizations and for ex vivo applications. Polyethylene ‘sleeves' can be slipped over less rigid catheter materials (MicroRenathane , RenaSil) at suture points to protect the latter from inadvertent constriction.