Rebound insert. Replacement Ohlins top caps. Higher performance rate springs. Note: Image may differ from the actual product application.Fits:HONDAGrom 20-23, GromABS 20-23 The Ohlins FDK 100 cartridge kit is a great performance upgrade for your bike. Improved handling, cornering and braking are immediately noticed. Full maintenance capability. Alternative spring rates available. Compression insert.