Die Sinking Electrical Discharge Machines Item #: FORM 350 SP A veritable concentration of innovation and technology, the Speed Edition range indeed merits its name. By giving you the opportunity to greatly increase your ......Die Sinking Electrical Discharge Machines Item #: FORM 350 SP A veritable concentration of innovation and technology, the Speed Edition range indeed merits its name. By giving you the opportunity to greatly increase your useful machining time, the new FO 350 SP machines allow you to take pole position in your markets.