Visibility Disc acc. to Secchi,10m steel rope, mar Back Catalog number: 443594 Availability: In the manufacturer's stock Price on request - + Recommended 438703 Spare Net Part for Ring Trawl Net with bolt rope Price on request 438412 Spare Net Part for High Speed Plankton Collector N Price on request 438212 Net Part for Neuston Net, mesh size 300microns Price on request