Package of 50 Cover Plates, diameter 33mm Back Catalog number: 435028 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 5065M-310 Surface Catch Net Price on request 438010 Plankton Net for quantitative collections with cow Price on request 438060 Surcharge for mesh size < 55µ for nets 438 000, 43 Price on request