Used on 6640-01-256-9697. 0.250 inch inside dia, 0.375 inch outside dia, 0.062 inch width; silicon material; for use on blood cells counter, mdl 131 series
Used on 6640-01-256-9697. 0.437 inch inside dia, 0.625 inch outside dia, 0.062 inch width; neopreme material; for use on blood cells counter, mdl 131 series