Concentric Slave Cylinder

Hi All,

I'm ordeing a new DMF and SACHSclutch kit for my ASZ VRS.

I believe when replacing the flywheel and clutch you need to replace the hydraulic/concentric slave cylinder. My question is which one should I order? On Euro car parts there is a Aftermarket Concentric Slave Cylinder, FTE clutch master cylinder, FTE clutch slave cylinder, clutch slave cylinder, clutch master cylinder, LUK concentric slave cylinder, Concentric slave cylinder and SACHS clutch slave cylinder.

Does it matter which one I buy as the LUK concentric slave cylinder comes in a lot cheaper? WHich one is best seeing as I'm buying a SACHS DMF and clutch kit? Are the clutch slave cylinders different to the concentric slave cylinders?

Sorry to be a pain.