Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MK2-2500-LB found under Flotation Bladder by Subsalve Usa Corporation. The National Stock Number assigned to this part is 4820016874171, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MK2-2500-LB.