Use the STINGER StaplePac exclusively with the pneumatic CS150B Cap Stapler to install synthetic underlayment, roofing felt, housewrap, foamboard, and lumber wrap. StaplePac combines our best practice 1” (25mm) collated plastic caps with 7/16” (11mm) 18ga crown staples, with a 1-¼” (32mm) leg in one package. StaplePac meets ASTM F1667, contains 10 rolls of 200 caps and 20 strips of 100 staples to cover 25 square, and is also available in 5/8” (16mm), 7/8” (22mm), and 1-½” (38mm) lengths. Why use collated cap fasteners? Ours are simple to install and protect better against the elements. STINGER collated caps withstand UV exposure up to 10X longer than hand drive caps—that's over a year (ASTM D7869-17). They offer superior wind-resistance, holding on in 150 mph hurricane-force winds for 60 minutes (ASTM D3161). The plastic creates an effective seal on the underlayment, reducing moisture penetration