You pick from our supply of brass connectors for 3/16” ID lab tubing. Connectors themselves have 1/8” IDs. We have elbow connectors and union (straight) connectors.

Like the ubiquitous oxygen tubing found in medical settings everywhere, we have this clear acrylic tubing available in 23-1/2" long pieces. Tubes measure 9/32" OD x 5/32" ID. Great for fountains, science fair projects, Halloween costumes, unique holiday decorations and modern sculpture.

This connector is 3-3/8" of straight "in-line" plastic with 5/8" ridges only and a 13/32" I.D. It has a separator rib around its mid-section.