Suitable Needles: Any Standard, or Arrow C121, T121, Y121, T131, C131, B131. Suitable Tag Pins: Any 50 pcs Standard Tag Pin, Standard Hook Pin, Standard `V' Pin, and Standard Ring Pin. Fabric Piercing Diameter: - 2.0mm. Maximum Thickness of Fabric: - 10.0mm. The best tool for any tagging application. Brand new price tag gun with 2000 barbs. The barbs are easy to use, attaches barcode and price tags to clothing. Always install the protective cover over the needle when not in use. The steel based needles are in highest quality. Compatible with regular barbs, attachments and hook attaches.