Spare Parts (Equipment / Apparatus) › ELECTRICITY KIT - THOMPSON’S RING TO FIT IRON CORE Image 1 of 1 ELECTRICITY KIT - THOMPSON’S RING TO FIT IRON CORE $3.63 Code: PA1763-270 Add To Cart Added! Code: PA1763-270 IEC Electricity Kit spare part - Thompson's ring (floats in AC magnetic field). You Might Also Like Quick View ELECTRICITY KIT – CORES - PLAIN IRON - SET OF 3 $25.40 Quick View PUSH SWITCH – SPARE FOR BKE (BEK) KIT $7.95 Quick View CHANGEOVER SWITCH – SPARE FOR BKE (BEK) KIT $7.00 Quick View ELECTRICITY KIT MAGNETISM DEMO ROUND COIL $62.00 Quick View ELECTRICITY KIT – COILS - 1000T FOR U/I CORE $78.80