Standard 2 Hole Paper Punch 30 Sheets Capacity Black (90079)

Business Source 2-Hole Punch, 1/4 Holes, 30 Sheet Capacity, - Yahoo Shopping

Business Source 2-Hole Punch, 1/4 Holes, 30 Sheet Capacity, - Yahoo Shopping

Swingline 2-3 Hole Punch, Adjustable, Commercial Hole

Bostitch Office EZ Squeeze One-Hole Punch, 10 Sheet Capacity, Lightweight, Gray/Blue

Swingline A7074030 LightTouch High Capacity Desktop Punch

Officemate Deluxe 3-Hole Punch, Heavy Duty, with Chip Drawer, 45

Officemate Standard 2 Hole Paper Punch, 30 Sheets Capacity, Black. Punches 30 sheets. Adjustable centering gauge for punching accuracy.

Standard 2 Hole Paper Punch, 30 Sheets Capacity, Black (90079)

Officemate Punch, Two-Hole, Standard, 30 Sheet Capacity (90092)

References - Airborne Measurements for Environmental Research - Wiley Online Library