Margulies coil
Spiral-shaped coil. From the halfway point, the diameter, from the inside to the outside, is twice as thick. At its end, there is an approx. 9cm long, straight stem, with seven small bobbles.
Spiral-shaped coil. From the halfway point, the diameter, from the inside to the outside, is twice as thick. At its end, there is an approx. 9cm long, straight stem, with seven small bobbles.