7Pcs/12PCS/14Pcs/ER20 Spring Collet Set For CNC Milling Lathe Machine. 7PC ER20 Spring Collet 1/8"- 1/2" For CNC Milling Lathe Tool Engraving Machine. Model: ER20. 7Pcs ER20 Collets. ER11/ER16/ER20/ER25/ER32 Spring Collet Set For CNC Milling Lathe Machine.
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