The easiest way to support indeterminate or semi-determinate tomatoes is with these tomato spirals. The plant is allowed to grow into the spiral, which provides a natural support. Product: Tomato Spirals Material: Steel Wire Surface Treatment: Galvanized, PVC Coated Common Size: Diameter - 5.5mm, 6mm, 7mm, 8mm Length - 1.5m, 1.6m, 1.7m, 1.8m Other sizes are available on request. Tomato Spirals are also great for beans and cucumbers.