Two or Three Heads Mini Size Cylinder Square Body used on Sock Knitting Machinery
| NO. | Designation | Material | NO. | Designation | Material |
| 1 | Rod Nut | Carbon Steel | 10 | Barrel(Without) | Hard anodized aluminum |
| 2 | Cover Nut | Carbon Steel | 11 | Piston Rod(Without) | S45C Hard chrome carbon steel |
| 3 | Front Cover Seal | NBR | 12 | Piston Seal | NBR |
| 4 | Front Cover | Aluminum Alloy | 13 | Piston | Aluminum Alloy |
| 5 | O-ring | NBR | 14 | Wear Ring | PA66 |
| 6 | Adjustable Screw | 15 | Magnet (Optional) | RbFeb | |
| 7 | Self Lubricating bearing | PTFE+Brass | 16 | Hex Socket Screw | Carbon Steel |
| 8 | Cushion Seal | NBR | 17 | Back Over | Aluminum Alloy |
| 9 | Cover O-ring | NBR |
