This is a market research Sources Sought notice from NIST to identify vendors capable of providing Vector Network Analyzer Extender Heads according to attached specifications. The purpose is to determine if the eventual procurement can be set aside for small businesses, with all small business categories being considered. The government is seeking capability statements from all responsible sources, including both large and small businesses. Responses should include company details, product specifications, lead times, and small business status verification. No solicitation is currently available, and this notice does not commit the government to issue one or award a contract.