Yan paper pen:
Yan paper conventional pencil: slot width 0.3mm, slot depth 6.6mm, total length 110mm
Paper deepening pencil: groove width 0.3mm, groove depth 10mm, total length 110mm
Widened paper roll pencil: 1.3mm slot width, 10mm slot depth, 110mm total length
Extended paper roll pen: groove width 0.3mm, groove depth 8mm, pen length 50mm, total length 143mm
Yan paper stylus: needle thickness 1.1mm, needle length 40mm, total length 130mm