Mfg. Part No.: GR5010516C Brand: Channellock Products 50-Style electrogalvanized. Multi-purpose staple that is used for installing house wrap, insulation or roof felt. For use with most 50-style tacker staplers, including Duo-Fast, Bea, Fasco, Grex, Spotnails. Specification Description Leg Length 5/16 In. Crown Width 1/2 In. Package Quantity 5000 Package Type Box California – Prop 65 Warning: Cancer and Reproductive Harm. – www.P65warnings.ca.gov