GRIDDED SEDGEWICK RAFTER CELL, 1801-G20
( gridded every mm, BR / glass, 1.0ml; Alat hitung jumlah plankton)
Frame : brass, mounted on 1" x 3" glass slide.
Cell size : 50 mm x 20 mm x 1 mm ( 1.968" x 0.787" x 0.04" )
Cell volume : 1.0 mL
Includes : 2 cover glasses, plastic case.
1801-G20 Gridded model includes 1mm x 1mm grid etched