This 21 Degree Aluminum magazine part for the Metabo HPT NR83 Nailer Series (890624) is composed of high-grade aluminum alloy for exceptional durability. The Aluminum Magazine capacity is 50 -70 nails (2 strips). It accepts nails ranging in length from 2 - 3-1/4 inch. This part will fit any Metabo HPT NR83 series pneumatic nailer allowing for the flexibility to easily replace a steel magazine to aluminum based on end user preference.