Length: 100 mm
I.D.: 60 mm
Rate: 8 N/mm
Ø60 mm helper spring and Ø70 mm helper spring with left-hand thread. The springs can be nested to double the spring rate. The rate for individual spring is 4 N/mm.
Springs are electro zinc plated. Both ends of the springs are ground.
Round wire shape helper springs come with a adapter. Helper spring package are designed to be used with 60 mm main springs.