Ring Trawl (Calcofi) Net Back Catalog number: 438700 Availability: In the manufacturer's stock Price on request - + Recommended 443594 Visibility Disc acc. to Secchi,10m steel rope, mar Price on request 5070D-50 50m cable. PTFE coated stainless steel Price on request 443593 Visibility Disc acc. to Secchi, dia. 30cm,10m stee Price on request