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 438055-001 Repair Set for Net Bucket No. 438 055 Price on request 435100 Folsom's Plankton Sample Divider Price on request 435021 Tubular Plankton Chamber, capacity 5ml Price on request