
| 
 model  | 
 Number of slots  | 
 Shaft hole  | 
 Inner hole  | 
| 
 150×4B air  | 
 4  | 
 22-38mm  | 
 customizable  | 
| 
 160×4B air  | 
 4  | 
 22-42mm  | 
 customizable  | 
| 
 170×4B air  | 
 4  | 
 24-42mm  | 
 customizable  | 
| 
 180×4B air  | 
 4  | 
 24-48mm  | 
 customizable  | 
| 
 200×4B air  | 
 4  | 
 24-48mm  | 
 customizable  | 
| 
 220×4B air  | 
 4  | 
 28-48mm  | 
 customizable  | 
| 
 250×4B air  | 
 4  | 
 24-48mm  | 
 customizable  | 
| 
 280×4B air  | 
 4  | 
 24-48mm  | 
 customizable  | 
| 
 300×4B air  | 
 4  | 
 28-48mm  | 
 customizable  | 
| 
 320×4B air  | 
 4  | 
 38-48mm  | 
 customizable  | 
| 
 350×4B air  | 
 4  | 
 38-48mm  | 
 customizable  | 
| 
 380×4B air  | 
 4  | 
 38-48mm  | 
 customizable  | 
| 
 400×4B air  | 
 4  | 
 38-48mm  | 
 customizable  | 
| 
 450×4B air  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 500×4B air  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 600×4B air  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 650×4B Straight  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 700×4B Straight  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 800×4B Straight  | 
 4  | 
 38-60mm  | 
 customizable  | 
Note: Tolerance of outer diameter: 4-4mm, support non-calibration.

| 
 model  | 
 Number of slots  | 
 Shaft hole  | 
 Inner hole  | 
| 
 150×4B air  | 
 4  | 
 22-38mm  | 
 customizable  | 
| 
 160×4B air  | 
 4  | 
 22-42mm  | 
 customizable  | 
| 
 170×4B air  | 
 4  | 
 24-42mm  | 
 customizable  | 
| 
 180×4B air  | 
 4  | 
 24-48mm  | 
 customizable  | 
| 
 200×4B air  | 
 4  | 
 24-48mm  | 
 customizable  | 
| 
 220×4B air  | 
 4  | 
 28-48mm  | 
 customizable  | 
| 
 250×4B air  | 
 4  | 
 24-48mm  | 
 customizable  | 
| 
 280×4B air  | 
 4  | 
 24-48mm  | 
 customizable  | 
| 
 300×4B air  | 
 4  | 
 28-48mm  | 
 customizable  | 
| 
 320×4B air  | 
 4  | 
 38-48mm  | 
 customizable  | 
| 
 350×4B air  | 
 4  | 
 38-48mm  | 
 customizable  | 
| 
 380×4B air  | 
 4  | 
 38-48mm  | 
 customizable  | 
| 
 400×4B air  | 
 4  | 
 38-48mm  | 
 customizable  | 
| 
 450×4B air  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 500×4B air  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 600×4B air  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 650×4B Straight  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 700×4B Straight  | 
 4  | 
 38-55mm  | 
 customizable  | 
| 
 800×4B Straight  | 
 4  | 
 38-60mm  | 
 customizable  | 
Note: Tolerance of outer diameter: 4-4mm, support non-calibration.