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US $6.9 / Lot
5 Pieces / Lot
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US $12
US $8.9
US $20
US $21
US $39
US $26
5 Pieces a lot
MK7 Gear Size: 5*9*11mm (inner diameter * outer diameter * weight)
MK8 Gear Size: 5*12*13mm(inner diameter * outer diameter * weight)
MK7 use M4 screw nut
MK7 gear can use for 1.75mm filamnet, MK8 can use for 1.75mm and 3mm filament
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