Precision perforation gauge for accurate readings! The perforation of the stamp is placed against the raised teeth of the gauge - it’s fast, easy, and precise! Especially practical: The lid of the box can be used to detect watermarks by using chemically safe watermark fluid.

Size: 115 x 55 mm (4 1/2" x 2 1/8").

Item Subjects: Stamp Perforation Gauges, Watermark Supplies