JIS F-2017 Panama Chocks Type BC
| NOMINAL DIAMETER | L (MM) | L2 (MM) | L3 (MM) | H1 (MM) | H2 (MM) | MASS (KG) |
| 310 | 310 | 734 | 652 | 684 | 462 | 276 |
| 360 | 360 | 788 | 701 | 688 | 464 | 305 |
| 400 | 400 | 832 | 750 | 692 | 470 | 344 |
| 450 | 450 | 886 | 802 | 696 | 474 | 385 |
| 500 | 500 | 940 | 854 | 700 | 478 | 422 |
| NOMINAL DIAMETER | L (MM) | L2 (MM) | L3 (MM) | H1 (MM) | H2 (MM) | MASS (KG) |
| 310 | 310 | 734 | 652 | 684 | 462 | 276 |
| 360 | 360 | 788 | 701 | 688 | 464 | 305 |
| 400 | 400 | 832 | 750 | 692 | 470 | 344 |
| 450 | 450 | 886 | 802 | 696 | 474 | 385 |
| 500 | 500 | 940 | 854 | 700 | 478 | 422 |