23 Gauge Headless Pin Nailers Model: BAT-MP635B Features Ergonomically Designed Well Balanced & Powerful Rear Exhaust with Silencer Automatic Adjustment Magazine Secondary Trigger Design Specifications Weight 2.43 lbs. (1.1 kg) Dimensions 7.63” x 9.05” x 2.36” Mag. Capacity 100 Pins Operating Pres. 70 ~ 100 psi. BAT-MP650B Features Ergonomically Designed Well Balanced & Powerful Rear Exhaust with Silencer Automatic Adjustment Magazine Secondary Trigger Design Specifications Weight 2.54 lbs. (1.15 kg) Dimensions 8.89” x 9.05” x 2.36” Mag. Capacity 100 Pins Operating Pres. 70 ~ 100 psi.