BOSTITCH SBCAPS 1000 Caps for Cap Stapler and Nailer Bostitch caps for use with the SB150SLBC-1 Cap Stapler and N66BC-1 Cap Nailer 1-Inch plastic caps eliminate pull-through when installing felt, house wrap and foam board insulation The cap method proves to be 10 times faster than nailing by hand Comes in quantity of 1,000 Backed by 7-year limited warranty