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The large o-ring is used for all Sheaffer "Fat" Touchdown (first year) or PFM barrel seals. This O-ring can also be used for converting pens to eye dropper fillers. Quantity discounted based on how many you need.
10 E. College Ave. Suite 112A
Appleton, WI 54911
Phone: 920-997-8220 | Mon-Fri 9:30-5:30 CST | Sat 10:00-2:00 CST