NUO Series Standard Duty Non-Upset End Tubing Protection NUO Series standard duty non-upset end tubing protection guards exposed tubing pin ends. It is easily installed and removed with a non-threaded, push-on design and a tear ring; meets standard duty requirements. The protection is made with recyclable polyethylene. Material: Low-Density Polyethylene Color: Black Design UEO Series Standard Duty External Upset End Tubing Protection UEO Series standard duty external upset end tubing protection guards exposed tubing pin ends. The protection is easily installed and removed with a non-threaded, push-on design and a tear ring; meets standard duty requirements. It is made with recyclable polyethylene. Material: Low-Density Polyethylene Color: Black Design 342 * For other material and color options, contact customer service.