Tender Announcement From: Directorate Of The Consortium For The Equipment And Operation Of The Canfranc Underground Laboratory. Purpose: Supply Of Manufacturing Polymethylmethacrylate Domes With Very High Transparency To Ultraviolet Light By Thermoforming To Obtain Anti-Implosion Covers For 20-Inch Photomultipliers For The Hyperkamiokande Experiment. File: Smpa004/2026.