Package of 50 Cover Plates, diameter 33mm Back Catalog number: 435028 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 435025 Combined Plate Chamber (Utermöhl-Chamber), set wit Price on request 438025 Spare Net Bucket for Plankton Nets No. 438 001 / 4 Price on request 438015 Spare Net Part for Plankton Nets No. 438 010 and 4 Price on request