Surebonder crown staples for use with Surebonder 18-Gauge Pneumatic Crown Stapler, Model 9630 Item# 259605. Fasteners Used Staples, Fastener Sizes in. 1 1/2, Fastener Size gauge 18, Coil or Strip Strip. 1/4in. crown staple 1 1/2in. leg length galvanized staple 18 gauge Model Number: 350-112G. Size: 1. Age Group: Adult.