Package of 50 Cover Plates, diameter 33mm Back Catalog number: 435028 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 435021 Tubular Plankton Chamber, capacity 5ml Price on request 435015 Plankton Chamber acc. to Kolkwitz, capacity 0.5ml Price on request 435010 Counting Chamber for zooplankton, volume approx. 9 Price on request