Ace Heavy Duty Staple 9/16 Narrow Crown For Underlayment, Carpets, Insulation, Porch Screening, Felt Stripping, Canvas And Upholstery Fits Ace Nos. 2111771, 2064673 And 2034775, Arrow Et-50, Etn-50, T-50pbn, T-50, T55, And Etf50pbn, Master Mechanic M550, M5000, M5100, Powershot 9100, 5700 And 8000, Stanley Tr60, Tr85, Tr150, Tr250 And Tre550 Box Of 1,000 Discovery Con, Nbr, Sup, Hwu Price is indicated for bulk discounted quantity of 4 unit(s) per case.