Visibility Disc acc. to Secchi, dia. 30cm,10m stee Back Catalog number: 443593 Availability: In the manufacturer's stock Price on request - + Recommended 438161 Pitch and Roll Sensor Price on request 438517-021 Net bag - protective net 300µ for WP2 Price on request 438133-021 Net bag Midi - protective net 300µ Price on request