Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HT90T-1KT found under Gram Stain Kit Tiss by Sigma Aldrich Corporation. The National Stock Number assigned to this part is 6550014494352, 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 HT90T-1KT.