Bostitch Caps and 1" Bostitch Staples Sl50351G. Comes with 5,000 caps and staples to a pack. To be used in Bostitch SB150S: BC-1 Cap. Stapler caps and staples eliminate pull-through when installing felt, house wrap and foam board installation. Adjustable depth of drive sets staples to the desired depths quickly and conveniently. Selectable trigger operation converts from sequential to contact operation.