18-gauge. Ideal for fastening case corners, drawers, cabinets, picture frames, molding, and decorative trim. For use in Porter Cable model No. BN200V12, BN125A, BN200A, BN125 and BN200, Bostitch model No. BT-35, Senco model No. SLP20, Paslode model No. 2138-F18, Makita model no. AF501, DuoFast model No. BB444, Hitachi model No. NT45A, Airy model No. ATK0241, and ATK0250. 5000 per box. No. BN18063: 5/8'' long No. BN18075: 3/4'' long No. PBN18100: 1'' long No. PBN18125: 1-1/4'' long No. PBN18150: 1-1/2'' long No. PBN18200: 2'' long