I'm Marco Ferrari of GEA S.r.l., I write to you about the spark plugs compatible for GE Jenbacher Series 3 - 4 engines (P3.V5.V3.)We are a service company and we would like to buy your product.We need to know delivery times from the date of receipt of order, at our headquarters in Via Morandi 2, CAP 40018 San Pietro in Casale Bologna Italy, possible discounts and payment conditions.