Tender Announcement From: Directorate Of The Consortium For The Equipment And Operation Of The Canfranc Underground Laboratory. Purpose: Manufacture And Supply Of Conical Stainless Steel Bodies By Repulsing With Welding Without Filler To Obtain Anti-Implosion Covers For 20-Inch Photomultipliers For The Hyper-Kamiokande Experiment Within The Framework Of The Recovery, Transformation And Resilience Plan. File: Smpa004/2025.