The OEM Quartet EnduraGlide dry-erase markers feature patented three-chamber technology for bold, continuous color on dry-erase boards, ceramic, glass, and other nonporous surfaces. This innovative design allows ink to flow steadily, ensuring a smoother writing experience and clean erasing. The convenient see-through barrel lets you monitor ink levels easily, while the roll-resistant cap prevents the markers from rolling away. These markers contain low-odor, nontoxic, quick-drying ink that erases cleanly.