This is a pair of Heavy Duty Control Horns from Du-Bro. Constructed of nylon Ideal for large aircraft Dual arm allows even, in-line movement of the control rod Two Heavy Duty Control Horns Two Support Plates with eight Mounting Bolts Two 4-40 Heavy Duty Swivel Ball Links Height from Base to Center of Pivot: 1" (25.4mm) jxs 02/06/13 ir/jxs &