Essential tool for master plate making. Holds 90mm or 100mm petri
dish firmly in place above any of nine popular grid patterns for
molecular biology, genetics and microbiology application. Grids
are printed in 25, 50, 70, 100, 150 and 200 square, 6 and 12 circle
segments and a black 100 square grid. Can be used on bench top or
on light box.
