Adjustable spring plate for Bosch Warm Up Regulator with vacuum adjustment. To replace defective old parts. Execution 1 with continuous bore; Execution 2 solid, without hole. Including sealing ring. Made in Germany. Adjustable Spring Support / Spring Seat for Bosch Vacuum Warm up Regulators. For replacing defective used parts. Version 1 with borehole; Version 2 Without Borehole. Comes with a new o-ring. Made in Germany Visit our shop for more / Visit our shop for more.