Visibility Disc acc. to Secchi,10m steel rope, mar Back Catalog number: 443594 Availability: In the manufacturer's stock Price on request - + Recommended 438753 Spare Net Part (one single net) for Bongo Net with Price on request 438213 Net Part for Microplastic nets, Hydro-Bios No. 438 Price on request 450010 Set of 12 Experimental Bottles (Serial No. xx) Price on request