Features: For heavy duty stapling jobs such as insulation carpet under laying and roofing felt Stanley staples feature color-coded packaging to make size and product selection a cinch Heavy duty staples with sturdy plastic packaging reduce staple breakage Heavy duty narrow crown staples; fits TR100 TR200 TRE500 series PHT150 PHT250 and Arrow T-50 Crown width: 27/64 in Crown width: 11 mm Quantity: 1000 Size: 9/16 in Size: 14 mm Type: narrow crown staples