The Bostitch 9R203925 Cap is universally used across several specific pneumatic finish nailers produced by Stanley Black & Decker under both the Bostitch and DeWalt labels. The models that fit this cap include:
Bostitch BTFP72155 (Type 1 and Type 15180000+ variants) Smart Point 15-Gauge DA Style Angled Finish Nailer
Bostitch BTFP72156 (Type 1 and Type 15180000+ variants) Smart Point 16-Gauge Straight Finish Nailer
Bostitch DA1564SP 15-Gauge Angled Finish Nailer
Bostitch N62FNSP-E Industrial 15-Gauge Angled Finish Nailer