Visibility Disc acc. to Secchi, dia. 30cm,10m stee Back Catalog number: 443593 Availability: In the manufacturer's stock Price on request - + Recommended A986-150 Liquid Funnel. 150mm Diameter. 316Lss Price on request A976-300 300mm Bent tweezer. 316L stainless steel Price on request A976-200 200mm Bent Tweezer. 316L stainless steel Price on request