Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SRB-100-NSU R134A found under Display Case Mechan by Low Temp Industries Inc. The National Stock Number assigned to this part is 7310015103848, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SRB-100-NSU R134A.