Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GR 191 found under Nonmetallic Channel by Greene Rubber Company Inc. The National Stock Number assigned to this part is 9390010901693, and the Federal Supply Class is 9390 Miscellaneous Fabricated Nonmetallic Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like GR 191.