4 Color 4 mm L Silicone Plugs for Ink Refill HP 88 564 920 940 950 932 XL (4 PCS)
4 plugs per package (1x Black, 1x Cyan, 1x Magenta, 1x Yellow)
Outside diameter (OD) is 4mm. Fits most HP cartridges has a plastic ball for ink-filling spot
Drill a hole or use a nail and hammer knock the ball inside, refill then plug the hole
Premium grade silicone guarantees a tight seal and long life
Easy removal for refill in the future
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