Northwest Short Line 4846 Universal Driveline Couplers -- 2.4mm Primary Cups Shaft, 2.0mm Horned Ball Shaft, 1.8" Ball Diameter

Ball-type universal driveline coupling for use as double universal or as two single joints. Sets with the same ball sizes may be combined to couple different shaft sizes. Easy-to-install press-fit ot cup can be drilled and tapped for set screw, Made of celcon acetal engineering plastic. 2.4mm fits 3/32".
 
2.4mm additional cups.