... and engineering support. Featured ServicesWe offer the fastest lead time and lowest cost for 2 layer and 4 ... prototypes. For 2 layer samples, our standard lead time is 3-4 working days, and in ... . And for 4 layer samples, our standard lead time is 4-5 working days, and in ... price.All projects come with our 100% satisfaction guarantee.Free tooling, solder mask, silkscreen. Panelizing allowed. No ...