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 5070C-50 Copper Wire 50m Price on request 443594 Visibility Disc acc. to Secchi,10m steel rope, mar Price on request