Prime Guard Max from Grip Rite MAXB64891 16-Gauge 7/16-inch Medium Crown by 1-1/2-inch 304-Stainless Steel Staples in Belt Clip Box, 500-per box Type 304 Stainless Steel New Belt-Clip Box for convenient storage on the job Fits all 16 gauge "N" style staplers 7/16-inch Crown.