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 438060 Surcharge for mesh size < 55µ for nets 438 000, 43 Price on request 435028 Package of 50 Cover Plates, diameter 33mm Price on request