Memorization check sheet set, green, includes 5 sizes. - Set includes: 5 textbook-size check sheets, 1 ground-size sheet, 2 con-size sheets - Brand: ZEBRA - Color: Green - Purpose: For memorization - Features: When you write with a separately sold check pen and then overlay this sheet, the writing turns black and becomes invisible. An essential item for memorization. Although new and unused, there are traces of price tag removal. Thank you for looking.