One set of 2 new friction disc (clutch disc) for Eurocardan PTO clutches. It also also fit many other makes of PTO shafts clutches. 

Outside Diameter:  4.75" (120.6mm)

Inside Diameter:  2.63" (66.7mm)

Thickness: 1/8" (3.2mm)

Part Number: 1804000

OEM #19-413