Commercial 2", 2900 and 2900s Valve Lower Seal Spacer Kit.*** Includes 4 Seals ( PN 11720 ), and 2 Spacers ( 10369 ) and 1 large black Spacer ( 14753 )
Top part of 2900 Valve uses the Fleck Seals and Spacers Kit 60121
models before 2005
After 2005, it is likely you have the 2900s model, which used Upper ( top ) Seals & Spacers Kit Kit 61530
, which has an extra Seals & extra Spacer.
*** YouTube video that shows removing the Lower Piston and Seals Kit,