Aluminium crimp cap, ND20 with central hole, 10 mm and septa. Supplier: VWR Collection. Description: VWR®, N/A, Chromatography vial closure, Aluminium, Ø: 20 mm, Type: Aluminium, plain, centre hole, cross-slitted, Hardness: 45° shore A, Septum: Silicone transparent blue/PTFE white, Thickness: 3,0 mm. ,548-1838EA,548-0589EA,548-0580EA,548-0061EA,