This special stainless steel conical spring, when compressed, has a thickness of only 0.35mm.
With this new conical design, UNIQUE IN THE WORLD OF SLOT, it will no longer be necessary to cut the spring to reduce its thickness when it is compressed. You will also continue to preserve the important parallelism at the ends of the spring to obtain the correct return of the guide and also maintain the necessary firmness for the guide to work correctly.
