网页VWR® 8-425 Screw-Thread Vials | VWR VWR® 8-425 Screw-Thread Vials Supplier: VWR, part of Avantor Standard opening screw-thread vials are manufactured from borosilicate glass and have a maximum fill volume of 1.8 ml. Borosilicate glass Screw caps with preattached septa Closures are black and have preattached septa.