Package with pair of springs with linear K-rate, specific for Bitubo cartridges type RDH - ECH - ABB - JBH. To customize the fork response to your guiding / weight requirements, you can choose from a wide range of K-rates, ranging from 0.45 kg / mm to 1,1 kg / mm (depending on the application and the cartridge model). 

Consult the paper catalog 2019, application list section page 203, for code table and K-rate available for every specific Bitubo cartridge model.

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