Visibility Disc acc. to Secchi, dia. 30cm,10m stee Back Catalog number: 443593 Availability: In the manufacturer's stock Price on request - + Recommended A854-150 Angled Tweezer (forceps). 150mm Price on request 5065A-6001 Telescopic Rod. - 1.8m to 6m Price on request 5070D-25 25m cable. PTFE coated stainless steel Price on request