The chart below provides the dimensional data for our standard Helical Spring. However, custom diameters, widths and thicknesses can also be supplied. There are no tooling charges for special diameters or different material slit widths. Special material requirements for 17-7 PH Stainless are available and can be supplied within two weeks. The following Elgiloy strip thicknesses and widths are also in stock and available without minimums.