Markerators also pricing guns or labeling guns are used for putting marks on goods. They are used for encoding, applying information about the price or the date of manufacture of products. Such devices print the information on labeling tape. It is easy and quick to replace the roll of adhesive tape even during the marking process. The price tickets applied with a markerator can be found in supermarkets, shoe stores, drug stores, on the dairy or bakery. The devices are equipped with straps for wrist and ergonomically designed for convenience of use. They can be both single-line and two-line. One-line model, where the information is printed only in one row, such as Dynamic Open C8, contains 8 characters per line; it can be both letters and numbers, or other characters. Two-line markerators can be used for application of more complete information. Model Open C20 contains 10 characters per line; other models apply nine characters on the top line and 8 on the bottom. For example, a word – the name of a product can be printed on the top line and on the bottom line it could be the price or date of manufacture. The products of Open Data are remarkable for the quality of print-through characters, simplicity and convenience.