The ST400i barbed staples are 4mm (9 Gauge) diameter and are recommended to be used for rural livestock fencing, medium mesh, heavy mesh and heavy woven fencing. It is also great for highway boundary fencing. The staples have also been used in Rural utilities applications for attaching the earth wire to power poles.
1000 staples per/box with 2 x fuel cells.  
for use in STOCKade ST400i Cordless Fence Stapler.
Available in lengths:
2” (50mm) SS4i50
1 3/4” (45mm) SS4i45
1 1/2” (40mm) SS4i40