... '' 1.25'' 1.50'' 2'' 2.5'' 3'' 3.5'' 1) FRP antenna tube fiberglass antenna tube GRP antenna tube, pole, cover2) Diameter: 19mm 20mm ... .125'' 1.180'' 1.250'' 1.50'' 2'' 2.5'' 3'' 3.5'' 4''3) Color: red, black, white, yellow, blue, green ... ) High Strength, Corrosion resistance, Chemical resistance, Flexibility, Aging resistance Fiberglass Antenna covers