Original Entex Specification:
| Stock Code | Free Length (in) | Rate Lb/in | To Work In - Hole Size (in) | To Work Over - Rod Size (in) | Load When Solid Lb/in | Solid Length (in) |
|---|---|---|---|---|---|---|
| 400 | 1 | 480 | 0.75 | 0.375 | 800 | 0.752 |
| 401 | 1.5 | 300 | 0.75 | 0.375 | 800 | 1.03 |
| 402 | 2 | 220 | 0.75 | 0.375 | 800 | 1.24 |
| 403 | 2.5 | 180 | 0.75 | 0.375 | 800 | 1.6 |
| 404 | 1.5 | 460 | 1 | 0.5 | 1334 | 1 |
| 405 | 2 | 360 | 1 | 0.5 | 1334 | 1.22 |
| 406 | 2.5 | 280 | 1 | 0.5 | 1334 | 1.54 |
| 407 | 3 | 240 | 1 | 0.5 | 1334 | 1.71 |
| 408 | 1.5 | 800 | 1.25 | 0.625 | 1779 | 1.08 |
| 409 | 2 | 560 | 1.25 | 0.625 | 1779 | 1.32 |
| 410 | 2.5 | 440 | 1.25 | 0.625 | 1779 | 1.65 |
| 411 | 3 | 360 | 1.25 | 0.625 | 1779 | 2 |
| 412 | 3.5 | 320 | 1.25 | 0.625 | 1779 | 2.32 |
| 413 | 4 | 280 | 1.25 | 0.625 | 1779 | 2.6 |
| 414 | 4.5 | 260 | 1.25 | 0.625 | 1779 | 2.95 |
| 415 | 5 | 220 | 1.25 | 0.625 | 1779 | 3.15 |
| 416 | 5.5 | 200 | 1.25 | 0.625 | 1779 | 3.39 |
| 417 | 6 | 180 | 1.25 | 0.625 | 1779 | 3.66 |
| 418 | 1.5 | 1040 | 1.5 | 0.75 | 1890 | 1.1 |
| 419 | 2 | 780 | 1.5 | 0.75 | 2668 | 1.26 |
| 420 | 2.5 | 580 | 1.5 | 0.75 | 2401 | 1.6 |
| 421 | 3 | 520 | 1.5 | 0.75 | 2668 | 1.85 |
| 422 | 3.5 | 420 | 1.5 | 0.75 | 2224 | 2.1 |
| 423 | 4 | 400 | 1.5 | 0.75 | 2668 | 2.3 |
| 424 | 4.5 | 340 | 1.5 | 0.75 | 2668 | 2.6 |
| 425 | 5 | 300 | 1.5 | 0.75 | 2668 | 2.8 |
| 426 | 5.5 | 280 | 1.5 | 0.75 | 2668 | 3.17 |
| 427 | 6 | 260 | 1.5 | 0.75 | 2668 | 3.37 |
| 428 | 2 | 980 | 2 | 1 | 3558 | 1.36 |
| 429 | 3 | 680 | 2 | 1 | 3558 | 1.87 |
| 430 | 4 | 460 | 2 | 1 | 3558 | 2.38 |
| 431 | 5 | 380 | 2 | 1 | 3558 | 2.91 |
| 432 | 6 | 340 | 2 | 1 | 3558 | 3.45 |