If you’re in need of SL-STD-1821 or 540 Series, the team at ASAP AOG can help you with your search. We carry such items as Hose .38 X 2.50 Long, Lycoming, and more from reliable manufacturers like Superior Air Parts. We’re the leaders in overhaul replacement parts, and thanks to our accreditations (ISO 9001:2015 certified and FAA AC 00-56B), we have developed a loyal following with our customers. We have a dedicated account manager per location that would be more than happy to walk you through our parts acquisition process. Contact us now for an immediate quote for SL-STD-1821.