Description 4 Reviews One size 16 latex rubber sac for fountain pen restoration. One of the most common sac sizes. The size 16 latex sac is what you need for the restoration of Esterbrook J, SJ, and LJ pens, and many other pens. Please note: Price is per sac. Pen sacs are available in many different sizes and materials. Pen sacs are measured in 64ths of an inch diameter. Most sacs will need to be trimmed prior to use and are intentionally made longer than necessary. We offer Free Shipping on all orders over $69 for US customers! 4 Reviews Hide Reviews Show Reviews 5 My Esterbooks have new Posted by Ross Feinberg on Dec 23rd 2025 My Esterbrook J Series have new found life. 5 Cardinal Pens Size 16 Latex Sac Posted by David Rzeszotarski on Dec 16th 2025 I just used 15 of these for my pen repair class and they performed flawlessly. They are the correct size and thickness. 5 Just what I needed Posted by Ricki on Oct 28th 2025 Used one to repair a vintage lever-fill pen. Worked perfectly. 5 Cardinal pens size 16 Latex Sac Posted by Stan Brookshire on Oct 7th 2025 Great latex sacs that are correct size, but more importantly, great quality. No issues with the sacs not stretching out easily, trying to tear or split, and most importantly, no leaks/holes in the sacs. Great quality and consistent thickness all the way down the sac. No “hard” spots. Great product!
5 My Esterbooks have new Posted by Ross Feinberg on Dec 23rd 2025 My Esterbrook J Series have new found life.
5 Cardinal Pens Size 16 Latex Sac Posted by David Rzeszotarski on Dec 16th 2025 I just used 15 of these for my pen repair class and they performed flawlessly. They are the correct size and thickness.
5 Just what I needed Posted by Ricki on Oct 28th 2025 Used one to repair a vintage lever-fill pen. Worked perfectly.
5 Cardinal pens size 16 Latex Sac Posted by Stan Brookshire on Oct 7th 2025 Great latex sacs that are correct size, but more importantly, great quality. No issues with the sacs not stretching out easily, trying to tear or split, and most importantly, no leaks/holes in the sacs. Great quality and consistent thickness all the way down the sac. No “hard” spots. Great product!
