Available from 2 kilogram force per millimeter (112 pounds/inch) to 20 kilogram force per millimeter (1120 pounds/inch)
Straight spring designs in 60 millimeter, 65 millimeter, and 70 millimeter inner diameter; taper spring designs in 70-90 millimeter, and 70-100 millimeter inner diameters
Spring lengths from 150 millimeter to 300 millimeter
Constructed of SWOSC-KW silicon chrome metal (JIS standard)
Will not sag after spring is fully compressed (coils touch)