This is a 1/2" High Nylon Ball link control horn by Robart. FEATURES: Grey nylon construction. INCLUDES: Two nylon control horns with installed balls. Two nylon backplates Six mounting screws 2x16.5mm REQUIRES: Linkages SPECS: Height: 15.2mm (.602") Width: 12.6mm (4.99") Overall length: 25.3mm (1.0") COMMENTS: This horn will provide control motion in two planes so that you do not need to bend your control horns and so that there is no binding on your control surfaces. pjm 4/20/02 ir/kh