| 1000 °F / 537 °C: Cinta de fibra de vidrio con aislamiento eléctrico | ||||
| Número de pieza | Espesor (mm) | Contar/10mm | Fuerza rota | |
| Envoltura | Trama | N/20 mm | ||
| WFT310 | 0,10 | 21,0 ± 1,0 | 12,0 ± 1,0 | ≥700 |
| WFT313 | 0,13 | 23,0 ± 1,0 | 12,0 ± 1,0 | ≥800 |
| WFT315 | 0,15 | 23,0 ± 1,0 | 10,0 ± 1,0 | ≥800 |
| WFT318 | 0,18 | 23,0 ± 1,0 | 10,0 ± 1,0 | ≥1400 |
| WFT320 | 0,20 | 23,0 ± 1,0 | 12,0 ± 1,0 | ≥1400 |
| WFT325 | 0,25 | 23,0 ± 1,0 | 10,0 ± 1,0 | ≥1600 |
| WFT330 | 0,30 | 21,0 ± 1,0 | 8,0 ± 1,0 | ≥1900 |
| WFT332 | 0,32 | 21,0 ± 1,0 | 10,0 ± 1,0 | ≥2000 |