This is the A version. There is also a version without the A. The one without the A doesn't have threads. This one does.

Distributor comes complete and is ready to be bolted onto your engine. Included with it is all new distributor cap, condenser, rotor, dust cap, and o-ring. Fully disassembled and cleaned down to the tiniest part using an ultrasonic cleanser with corrosion inhibiting agents. Checked to be in spec with a recently restored and calibrated Sun distributor testing machine. New Bosch fiber washers, extra wide shims, lubricating wick and felt have been used for rebuild. All replated parts have been zinc coated by industry leader in electroplating. This is a place where their business is electroplating (it's all they do) to ensure an even and thick coat of zinc that will last and protect. Bosch dust cap only comes with product when you select Bosch cap and rotor.

Price is per.