We can supply EX-31B, use the request quote form to request EX-31B pirce and lead time.XXX.com a professional electronic components distributor. With 3+ Million line items of available electronic components can ship in short lead-time, over 250 thousand part numbers of electronic components in stock for immediately delivery, which may include part number EX-31B.The price and lead time for EX-31B depending on the quantity required, availability and warehouse location.Contact us today and our sales representative will provide you price and delivery on Part# EX-31B.We look forward to working with you to establish long-term relations of cooperation