For more information please see the specifications datasheet (pdf).
type: MPI-RING-SPZT8-250-100X40 C ±12% (PF):910 tgδ (%) : <0.3 FS ±3% (kHz): 65 ΔF (kHz): 5 Rm (Ω): 17 Coupling factor Kt/Kr (%): ≥46 Curie point T °C: 320 Qm: ≥800