This item has been moved to https://cdm.llu.edu/digital/collection/p17224coll14/id/111/rec/2
Silicone plastic on a flexible wire frame with 200mm2 of copper wire (total) split into 4 segments. Two green nylon (?) threads tying the two ends of the device into a closed loop. Releases copper at a rate of 9.33 mcg per day. this unit appears to exhibit corrosion of the copper wire.