The modular design offers up to 8 modules with up to 17 feed stations, with high-capacity feeders, and a standard capacity of up to 1,500 sheets. Each system is available with these standard feeder combinations: one 1,000-sheet feeder, one 500-sheet and one 1,000-sheet feeder, or three 500-sheet feeders. The top-loading envelope hopper holds up to 800 #10 envelopes.