This document provides technical specifications for the OBPC550 Automatic Paper Punching Machine made by Ningbo Obinder Co., Limited. The machine can punch paper sheets from 120x100mm up to 550x600mm in size, up to 3mm thick, and weighing 55-350g/m3. It punches at speeds of up to 7200 times per hour and can hold 500mm of paper. Additional features include high speed punching of 120 times per minute, 550mm punching width, ability to punch 300g/m2 paper, fully automatic punching and collection, and variable punching hole patterns.