Atlas Double Black Linen® Tube was developed specifically for custom cue makers. The tubing is manufactured using a fine black linen and a proprietary pigmented-resin system. The material is a thermo-set linen impregnated phenolic plastic, strong, easy to machine, and jet black in color after applying a clear coat. Please note that the industry standard when manufacturing this material, for the tube lengths, is +/- 2" inches.