Media Summary: Manually punches up to 22 sheets (A4, letter size or below) of 80 gsm（20 lb） paper at a time. And Binding with 3:1 coil binding spiral or 3:1 wire-o binding ring. Tips: RAYSON EB-20 Comb Binding Machine, with electric punching
Rayson Sd 220b Binding Machine - Detailed Analysis & Overview
Manually punches up to 22 sheets (A4, letter size or below) of 80 gsm（20 lb） paper at a time. And Binding with 3:1 coil binding spiral or 3:1 wire-o binding ring. Tips: RAYSON EB-20 Comb Binding Machine, with electric punching
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