ITEM NAME:C12-ER11A-100L Collet Chuck Holder Straight CNC Milling Extension Rod G3N9 C12-ER11A-100L Collet Chuck Holder Straight CNC Milling Extension Rod G3N9 Product Name: Straight Extension Rod ;Model: C12-ER11A-100L;Fit for: ER11 Collet Material: Metal;Color: Silver Tone , Black;Shank Dia: 12mm/ 0.47 inch Shank Length: 100mm/ 4 inch;Total Length: 125mm/5 inch End Thread Hole Dia: 9mm/ 0.35 inch;Overall Size: 125 x 19mm / 5 x 0.75 inch(L*Max.D) Net Weight: 90g; Straight Collet Chuck Holder CNC Milling lathe ER11 collet. A good replacement part for your old one. Package Content: 1 x Straight Extension Rod Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.