Phenolic Tubes made from Grade L Linen is a fine weave (less than 4 ounce/square yard) cotton fabric commonly called linen, combined with phenolic resin. It is used for smaller and more intricate shapes than Grade C Canvas Phenolic. This products is also known Linen Phenolic, Micarta L, and Bakelite. Note: These tubes are ‘made-to-order’ and may have a 3-4 week lead-time to ship. Contact us directly to inquire about expedited delivery options.