Portable Hand Tally Mechanic Counter 4 Digital Number Arithmometer Product Name : Arithmometer;Mode : TSL-6601 Weight : 84g;Digit : 4 Total Size : 5.4cm x 5.4cm x 6.4cm(L x W x H);Installing Hole Dia : 3.1mm Installing Hole Distance : 4cm Package : 1 xArithmometer