This is a combined synopsis/solicitation for commercial products prepared in accordance with the format in subpart 12.6, as supplemented with additional information included in the attached request for quote (RFQ) solicitation, Attachment 1. Solicitation N6833526Q0405 is for the procurement of six (6) Differential Electronic Levels in accordance with the Calibration Standards Specification (CSS FY21-CP-0009), Attachment 2. The Government intends to procure the above items under a full and open competition. The resultant contract will be a Firm-Fixed Price contract. The Government intends to award a contract based on the proposal with the lowest evaluated price that is rated Acceptable in both Technical and Past Performance. Contractors must be registered in SAM.