SIZE 14 LATEX SAC
I am restoring several Sheaffer Snorkel Admirals (1952-1959) and a Sheaffer Cadet (1953-1963). I started with PVC ink sacs and found they are too thick-walled to use in Snorkel pens. Anderson's Size 14 Latex sac goes in easily and works very well, the thickness is much thinner than PVC. Sheaffer originally used size 14.5 ink sacs but they are harder to find. If you're going to re-sac or restore a snorkel go with Latex sacs. You won't regret it!