NEW HUGE LOT 100's ISI MDC Miniature Insulator Seal Vacuum Ceramic ? # 9951001 This is awesome. Not sure what this is for, but you should know. There are 7 packs here. 6 are 9951001 and one 951000 These should be ceramic, but may be plastic. THey are very hard!! FREE USA SHIP NEW HUGE LOT 100's ISI MDC Miniature Insulator Seal Vacuum Ceramic ? # 9951001 This is awesome. Not sure what this is for, but you should know. There are 7 packs here. 6 are 9951001 and one 951000 These should be ceramic, but may be plastic. THey are very hard!! FREE USA SHIP Recommended products Provided by NEW LOT of 3 HH Smith Ceramic Threaded Standoff Insulator # 2628 / NL-523W 04 View item NEW HUGE LOT Vishay Dale Film Resistors RN60C6981FB14 RN60C2212FB14 RN60C2211 View item NEW NOS HUGE LOT of 100 Parker DUROMETER BLACK BUNA-N O-Ring 3cm ID N0552 2-025 View item NEW HUGE LOT Vishay Dale Film Resistors 1% 1/8W # RN55C3572FB14 RN55C4993FB14 View item NEW LOT of 75 Bergquist Thermally Conductive Insulator Sil-Pad MIL SPEC 2015-54 View item NEW LOT of 4 Miniature Rod Drive Collar # B934R / 3K2J View item New LOT of 3 DYN New Single Row Ball Bearing Miniature Precision # SFRW188ZZ View item NEW HUGE Gardner Denver Seal OIL 6.250 (ID) x 7.750 (OD) x 0.5 # 219704PSP View item