Forward torpedo tube / tubes; port side, of HMS Alliance, A class, Amphion class or Acheron class submarine. Royal Navy Submarine Museum, Gosport UK Stock Photo - Alamy
Aluminum Tube 1" x 3" x 10' .060" - Johnson's Surplus LLC
Alliance Mailing Tube 2 in x 24 in 00871/46008
15mm Auto Macro Tube - L-Mount Alliance Cameras for Close-up Photography – Fotodiox, Inc. USA