Ring Trawl (Calcofi) Net Back Catalog number: 438700 Availability: In the manufacturer's stock Price on request - + Recommended A266-100 100Litre Tight Head Drum. 316 Stainless Steel. Price on request A179-100 Aluminium Bottle 100ml Price on request 5070D-25 25m cable. PTFE coated stainless steel Price on request