SelfLube L-Gibs are made of solid aluminum bronze or steel. Our aluminum bronze can be ordered either with or without self-lubricating graphite and with or without pre-drilled mounting holes. Our steel is available with or without holes. We do not make any steel L-Gibs with graphite. Used to guide and control linear movement, they come in a variety of standard sizes. If a standard size won't work for your application, SelfLube can easily make a custom size. Please contact us.