260mm L x 180mm D Dimension One Spas 75 spa filter cartridge

260mm H x 180mm D x closed top with D-Handle x 58mm OD fine threaded spigot bottom (44mm ID)

Also replaces D1 cartidges with same specifications, but longer @ 380mm.
Used on many D1 models in the early - mid '90's. Sold individually (image may show multiple cartridges for ID purposes only)