To find out what size sac your pen requires, measure the diameter of the sac peg as shown below. Use this measurement to find the size of sac.
These modern 100% SILICONE sacs are produced by the injection moulding system.
These are excellent for replacing the sac in your CELLULOID PENS.
In this metric era it's a little difficult to measure in that format.
The table below of sac sizes has been converted to the nearest metric mm equivalent.
Available in the following sizes.
Size 14 Fits a sac peg of 5.5 mm
Size 15 Fits a sac peg of 5.9 mm
Size 17 Fits a sac peg of 6.7 mm
Size 18.5 Fits a sac peg of 7.3 mm
If the size of the sac peg fall between two sizes choose the smaller size sac.