Chrome plated steel. Thinner 1†(25.4mm) diameter where controls and risers are mounted. Drilled for internal wiring. Approx. dimensions: 14" (35.6m) rise x 35" (89cm) wide x 14.25" (36.2cm) center x 8.5" (21.6cm) pullback 82-21 H-D mech. & e-throttle (excl. 88-11 Springers) with 1" I.D. risers1 kpl