Made from bits and pieces. Brass tubing for the clevis, 1/8" Polystyrene tubing slipped over 2-56 threaded rod, aluminum sheet stock for the horn and bracket and .010" Polystyrene sheet stock used for the control rod shield. Note: the control rod is temporarily secured to the horn with a push pin, this will be replaced with stainless #0 x 1/4" pan head slotted screw and nut.