Surcharge for mesh size < 55µ for nets 438 030, 43 Back Catalog number: 438061 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 435035 Package of 250 Base Plates, diameter 27.5mm Price on request 438020 Plankton Net for quantitative collection with cowl Price on request 435025 Combined Plate Chamber (Utermöhl-Chamber), set wit Price on request