The Peterson Space Force Base (PSFB) 21st Contracting Squadron is requesting information from vendors that provide the subject list of materials. The North American Industry Classification System (NAI... The Peterson Space Force Base (PSFB) 21st Contracting Squadron is requesting information from vendors that provide the subject list of materials. The North American Industry Classification System (NAICS) code is 423610 Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers, and the small business size standard is 200 Employees. Please see attached documents.