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 435016 Plankton Chamber acc. to Kolkwitz, capacity 1.0ml Price on request 438055-001 Repair Set for Net Bucket No. 438 055 Price on request 435022 Tubular Plankton Chamber, capacity 10ml Price on request