Stock Profiles - Avia Rods and Tubes Precise carbon rods and tubes are pultruded from .125" to .625" in diameter. They have close tolerances, and are very strong and stiff, with an attractive finish. Excellent for sporting goods and lightweight structures. Stocked tubes are cut to length for immediate shipping. The fiberglass products have equally precise tolerances and are stocked in black and white. Other colors are available to match your specific demands. The fiberglass profiles provide an economical alternative to carbon for less demanding applications Click here to enter the catalog with our stock profiles!