500ml Jumbo Capacity – A single bottle refills standard markers many times. No more running out of ink at critical moments.
3 Essential Colors – Black, red, and blue in one pack. Perfect for color-coded marking, document signing, and quality control.
Oil-Based & Waterproof – Once dry, marks are permanent, water-resistant, and fade-proof. Ideal for outdoor, wet, or rough surfaces.
Versatile for High-Volume Users – Perfect for schools, offices, factories, warehouses, and shipping departments where markers are used daily.
Cost-Effective Bulk Solution – Buy once, use for months. Saves money compared to buying dozens of individual markers.
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.