Descriptions:Condition: New Nominal value: R25 (25 °) : (common) 1.5K, 2K, 5K, 10K, 20K, 30K, 47K, 50K, 100K, 200K, 500K, etc Resistance precision: ± 1%, ± 2%, ± 3% B value R25/50 (common) 3435k, 3600k, 3950k, 3990k, 4100k, 4200k, etc B value accuracy: ± 1% Temperature range of use: - 40 ° ~ + 300 ° Dissipation power factor: ≥5 mW / ° (static in the air) Biggest power rating: 45 mw Hot time constant: ≤7 s(in the air) Temperature coefficient of resistance: - 2 ~ 5% / ° Recommend the use of parameters: R25° = 100 k B25/50 = 3950 k ± 1%) Package Included:5 x Reprap NTC 3950 Thermistor 100K + 1 Meter Wire for 3D Printer Bed Hot End