Thermo Scientific PCB 3600688 Assy 4600256 Free shipping and a 30-day money back guarantee are included with this order. Same day shipping when processed before 1PM Central (M-F, US only) If there is anything wrong with the item that you have purchased, please contact us directly and give us a chance to help. We respond quickly and will ensure you are satisfied with your purchase and experience! Please do not leave negative feedback or open any disputes with eBay or PayPal. Contact us directly and we will fix the problem quickly. We strive for 5/5 Star service!