Visibility Disc acc. to Secchi, 3m steel rope, ma Back Catalog number: 443591 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 438115 Mechanical Flow Meter with back-run stop Price on request 450536 Oxygen Sensor OxyGuard Ocean D.O. Probe Price on request 443590-001 Spare Rope for Visibility Disc acc. to Secchi Price on request