Package of 250 Base Plates, diameter 27.5mm Back Catalog number: 435035 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 438040 Plankton Net for quantitative collection with cowl Price on request 435011C Counting Chamber for zooplankton, dimensions 80 x Price on request 435016 Plankton Chamber acc. to Kolkwitz, capacity 1.0ml Price on request