Heathrow Scientific HD5360A 6 Key Economy Benchtop Counter 250mm Length x 76mm Width x 56mm Height Mechanical, benchtop counters are ideal for determining the number of cells, counting parts, etc Use with blood cell label or insert your own Total window keeps track of the total number of stokes made on all other keys At one hundred totals, counter rings bell Measures 250mm length by 76mm width by 56mm height