This item is shown as Ref # 18 at the top of the pump illustration shown here.

Product Details:

• Connecting Rod Ring.
• Made by Hypro.
• Part # 9910-1880180.
• Replacement Part For The Following Pump Model #s: 9910-D303, D303GRGI, D403, And D403GRGI.
• 2 Parts Required Per Pump.