This UDOR diaphragm repair kit for KAPPA-30/40/T35 pumps includes:

• (1) Accumulator Diaphragm | Ref# 1300 in diagram
• (4) O-Rings | Ref# 1381 in diagram
• (2) Piston Diaphragm (DESMOPAN) | Ref# 8117 in diagram

You can see the parts included in the kit highlighted in the spec diagram.

The KAPPA-40 pump this kit goes with is pictured here as well.