Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 23-4P found under Extinguisher Fire by Fyr Fyter Co Inc. The National Stock Number assigned to this part is 4210000742872, and the Federal Supply Class is 4210 Firefighting Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 23-4P.