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 435100 Folsom's Plankton Sample Divider Price on request 435021 Tubular Plankton Chamber, capacity 5ml Price on request 438040 Plankton Net for quantitative collection with cowl Price on request