Sierra Army Depot in Herlong, California requires re-certification of nitrogen cylinders, to be awarded as one firm-fixed-price contract under unrestricted Simplified Acquisition Procedures. Award will be made on lowest price only that meets specifications, and multiple awards will not be issued. The applicable NAICS is 325120 with a small business size standard of 1,200 employees, and contractors must be registered in SAM when submitting an offer and remain registered through award, performance, and final payment. Quotes must be submitted using SF 1449, with solicitation availability limited to the electronic medium. All contractual and technical questions must be submitted in writing to the listed contract specialist or contracting officer, with no telephone questions accepted, and offerors are responsible for monitoring the website for amendments.