Make grading papers fun and exciting with our range of Ready-Made Teacher Stamps! A E Flash Teacher Stock stamp uses Double Foam Technology which produces a clear imprint. Comes with clearly labeled index messages to identify each stamp easily. Specifications: Diameter: 8mm x 35mm Ink Colour: Red Stamp Type: Pre-inked Stamp Refillable: Yes, use AE Flash Ink only Waterproof: Yes (Oil-based Ink)