3/4 inches long. 316 Stainless Steel. 18 Inch Straight Gauge. Adhesive placement. For use on all 18 gauge brad nailers including the following: Bostitch BT125K, BT200K, Dewalt D51338K, D51236K, DC616K, DC612KA, Hitachi NT38AE, NT32AE2, NT50AEm BT50AE2, Senco SLP20. Manufacturer number: T18N075FNB. SKU #: 2195725. Distributed by Simpson Strong-Tie/Swan Secure.