Like the rest of the Knockle line, it is unique from other whiteboard markers in that you pump the ink into the tip as you need it. To keep the tip richly saturated with ink, the Knockle features a special pump system.
Writing Instruments/Markers – Pentel of America, Ltd.
Vivid liquid Ink Unique pump action button replenishes ink supply to nib when writing For white or porcelain boards Bullet medium tip with 2.5mm line
Pentel Maxiflo Liquid Ink Drywipe Marker Eraser Set
Pentel Knockle Dry Erase Marker - Fine to Medium - Black
PENTEL MAXIFLO KNOCKLE Whiteboard Marker Fine Broad Dry-erase Black Blue Red Pen $3.99 - PicClick
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PENTEL MAXIFLO KNOCKLE Whiteboard Marker Fine Broad Dry-erase Black Blue Red Pen $3.99 - PicClick
PENTEL MAXIFLO KNOCKLE Whiteboard Marker Fine Broad Dry-erase Black Blue Red Pen $3.99 - PicClick
Pentel Maxiflo Whiteboard Marker
Vol 100 issue 08 2016 by My Office - Issuu
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Whiteboard Marker, Fine Chisel Tip Pentel Maxiflo Liquid Ink Dry Wipe Marker, Black/Green/Red/Blue