The T50 Genuine Arrow staples are made in the united states from quality stainless steel material, ensuring your stapling is precise, strong and long-lasting first time, every time. Available in 6mm (1/4 inch), 8mm (5/16 inch), 10mm (3/8 inch), 12mm (1/2 inch), 13mm (17/32 inch) and 14mm (9/16 inch) sizes with a flat crown width of 10mm. Also in stainless steel and monel materials.; ; Brand Name: Arrow Style or Series: T50 Crown Width: 3/8 in. Length: 1/4 in. Gauge: 18 Ga. Crown Type: Flat Crown Product Type: Heavy Duty Staples Number in Package: 1000 pk Color: Gray Packaging Type: Boxed Material: Stainless Steel Not for marine application