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Designed exclusively for the Diamond 530/540/580/Mini pen for clean and simple filling. Just unscrew the section and nib unit on your 530/540/580/Mini insert the special top on the bottle and turn the piston to fill the barrel with ink. Can be used with any other fountain pen by removing the special top.
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