Set of 12 Experimental Bottles (Serial No. xx) Back Catalog number: 450010 Availability: In the manufacturer's stock Price on request - + Recommended 438710 Hirizontal Plankton net, special design, single ne Price on request 443594 Visibility Disc acc. to Secchi,10m steel rope, mar Price on request 5065S-1500 Stainless Telscopic Rod Price on request