This is a wire winding clip, which produces its own Fibonacci spiral by winding copper wire around the clip by hand, for electric culture gardening, according to all the Fibonacci sequences found in nature Produce energy harvesting coils. The set includes a size and a small size. Having a slot with a precise start and then keeping the wire in the slot will that you get evenly spaced spirals along the entire length. This size is mainly suitable for potted plants that need smaller size, limited space or small potted plants in flower beds, as well as making Oxon stone pyramids, which can enhance the growth and vitality of plants in electric culture gardening projects. Use smaller gauge wire, the higher the quantity, the smaller the wire diameter, the smaller wire will be easier to bend, but not as hard. Both wire wrap clips fit 11-22 gauge copper wire, but 12 - 18ga is the right size for making electroculture coils. Our are made of high-quality and strong materials to durability and , ensuring multiple uses. 2 Fibonacci coil winding clips, used for electrical copper antenna, electrical cultural gardening antenna antenna fixture, tool Colour:White Material:plastic Size:9.2 x 5.1cm, 6.1 x 3.2cm Package Contents: 2 x copper coils for gardening Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.