SPECIAL ORDER ITEM. Review Returns Policy before purchase. This fittings are designed to be used with off the shelf schedule 10 to schedule 40 stainless steel pipe to form a complete press system that is ideal for both commercial and industrial applications. This fittings utilize a versatile FKM sealing element to provide a reliable leak free connection. This system can stand up to harsh environments while transporting process water diesel fuel lube oil ammonia low pressure steam or any number of other essential fluids or gases.