Descrição
    The R series was named because the tube is Roll-formed 
and therefore permanently closed, making these springs 
non-repairable. 
R series springs are available with Ø12, Ø15 and Ø19 mm 
tube diameters and with stroke lengths up to 125 mm. 
There are 4 color-coded models, all with preset forces. 
An adjustable model (black) is also available. it can be 
orderd either set to a specific charge pressure or it can