Highly durable paper file with improved strength and water resistance by soaking "resin" in the paper part. Since it has improved water resistance even compared to normal water resistant paper, it is difficult to tear even if it gets wet with water. Works great with GodHand FF Boards filing plates. Each sheet is 93.5mm by 228mm. Assortment A includes 1 240-grit, 1 400-grit, 1 600-grit, and 1 800-grit sheet.