Comes with mounting gasket! Most DGK121 replacement kits neglect to! Made by a renown Aftermarket vendor in Italy. Made to Meet or Exceeds OEM quality OEM Part Numbers: 7135-424, DGK121 Fits Bosch VE Diesel Injection Pumps a 20mm Drive Shaft This Replacement Gasket kit is new and works for Bosch* Rebuild Kit Numbers. DGK 121* Case Tractors, Dodge-Cummins Diesel, Onan (Bosch* VE - Rotary Style Pumps) This kit will work for most VE style Bosch* Pumps that have a 20MM drive Shaft. Drive Shaft seal is included for drive shafts 20MM and seal opening in housing 31MM Many of the pumps run good but leak simple due to o-ring drying out or being effected by the ever-changing diesel fuel chemistry. Send me your pump numbers if you are concerned about if this kit will work for your application.