| Specification | Inner diameter | Inner height | Style |
20mm aluminum plastic cap | 20.3mm | 7.5mm | flange top/flat top/flip off/tear off/circle cut |
 |  |
| 20mm aluminum plastic caps | Flange top aluminum plastic cap |
 |  |
| Flat top aluminum plastic cap | Flip off aluminum plastic cap-6 petal shaped |
 |  |
| Flip off aluminum plastic cap-6 bridge shaped | Tear off aluminum plastice cap-rotated top |
 |  |
| Tear off aluminum plastice cap-positioned top | Circle cut aluminum plastice cap |