Tubes made of braided carbon fiber in a female mold with pressure provided from inside. Hot cured resin is used for the tubes. This ensures they are geometrically stable up to 118 degrees C (245 F)

Tailplane tubular spar 4 mm. Product/Number: 038
Outer Diameter 4 mm
Inner Diameter3.6 mm
Length 410-440 mm
Weight 1.35-1.55 gram