Each spool of soft touch is 30 feet long and in the standard satin silver color.  There are four different sizes: Extra Fine - with a diameter of 25mm, Fine - with a diameter of .36mm, Medium - with a diameter of .48mm and a Heavy - with a diameter of .61mm.  The soft touch spool is a premium flex wire giving each piece more body and flow engineered to be 50% softer and more flexible.