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 438060 Surcharge for mesh size < 55µ for nets 438 000, 43 Price on request 435011B Counting Chamber for zooplankton, dimensions 80 x Price on request 435011 Counting Chamber for zooplankton, volume approx. 2 Price on request