![Glass Tubing, 6mm OD x 12", flint glass](http://www.homeeducationalresources.com/cdn/shop/products/11545_{width}x.jpg?v=1396395132)
Glass Tubing, 6mm OD x 12". Flint glass is also known as soda lime glass. The tubing listed is known as apparatus weight tubing, which is a reference to its wall thickness.
If your experiment calls for this glass tubing to be cut to length, we suggest looking into our 4" Triangular File.