S.T.C. BIOWORKS INSTALLATION KIT FOR SILICONE MEMBRANE AS PER INVOICE: 400395/8889.301 HS:8421,3926,4016,3921,7326,4009 S.T.C. SCHLEMMER GRANULES AS PER INVOICE: HS: S.T.C. SCHUNK KOHLENST. CARBON BLANKS AS PER INVOICE: 93211037 HS: 38019000 S.T.C. W