500ml Jumbo Marker Refill Ink – Black/Red/Blue, Oil-Based Waterproof

Got a marker that’s gasping for ink? This 500ml jumbo refill’s got your back—black, red, and blue magic juice that’s waterproof and oil-based (no smudging your masterpiece, promise). One bottle refills forever, so you can keep tagging, signing, or color-coding like a pro without the panic!

Refill when the ink color fades. Do not wait until the tip and sponge core are completely dry – once dry, the marker will not write again, even with extra ink.