Fiberglass rods and tubes are made of fiberglass. The diameter will be from 1mm to 10cm.And any length is ok.

free fiberglass rods as tree stakes, nursery stakes and vineyard stakes allow movement during windy conditions, yet limit the range, to reduce permanent damage during high winds. This natural movement stimulates root establishment and allows for maximum growth. The fiberglass stake includes a UV coating, which allows for maximum life in the field. Unlike bamboo, metal or wood stakes, pulwell fiberglass stakes are: 1. Maintenance free: A. Will not rust or rot B. Will not crack due to cold C. Flex with wind, snow and ice 2. Cost effective: A. Save - on faster, easier installations B. Save - on labor costs C. Save-you will never have to re-stake trees again D. Save - on replacement costs E. Save-has a 25-30 year life expectancy 3. Profitable: A. Allows max tree growth potential B. Reduces chafing and cankers C. Reduces tree damage.