1 in plastic caps. Eliminates pull-through when installing felt, house wrap and foam board insulation. For use with Bostitch Cap Stapler SB150SLBC-1 (SKU 273-5660) with 5/16 in crown 18 ga. staples and Bostitch Cap Stapler N66BC-1(SKU 172-6561) with 15 deg coil siding nails.
