Grip-Rite 16d Short - 3-1/4-Inch x .131 Vinyl Coated, Smooth Shank, 21? Full Round Head, Plastic Collated, Stick Framing Nails - 500 per tub For best results, use with Grip-Rite GRTFR83 and/or GRTRH350 21 degree round head framing nailers Compatible with most 21 degree round head framing nailers including: Bostitch, dealt, Duo-Fast, Hitachi, Makita, Porter-cable, Ridgid and Senco Should not be used in treated lumber. Should not be used where surface rust is unacceptable. Meets or Exceeds ASTM F1667 (if applicable) 16d 'Short' - 3-1/4" x .131" - Vinyl Coated, 21 Full Round Head Vinyl Coated For Smooth Driving, Smooth Shank, NON-Galvanized, Plastic Collated Strip Nails Clear, Resealable, Reusable, Stackable Plastic Tub. GREAT for Do-It-Yourself Projects Use with Grip-Rite GRTRH350 - 21 Full Round Head Framing Nailer 500 Nails per Tub