aluminium gold plated vertical hardware, high precision, this hardware have got larger cooling surface, deeper brush slots, another novelty is an upper little hook that ensures hardware will not tear off the endbell, hole pattern is the same as with #171, attention: before pressing the little hook to its final position, it is needed to grind out the layer of gold and nickel from upper side of the hook (0,05mm-0,1mm), packaged 6 pairs a bag