VWR® Culture Tubes, Disposable, with Screw-Cap Finish, Borosilicate Glass. Supplier: VWR International. Description: Tubes have a marking spot and reference mark for orientation during use and a threaded neck to accept screw cap. Certificates. ,53283-685CS,53283-802CS,53283-806CS,53283-800CS,53283-686CS,53283-804CS.