This set of mechanical experimental tools are made of premium metal and plastic. Including many kinds of equipments, having sturdiness and corrosion resistance. It is perfect for classroom and field applications to measure weight and to explore physics. Features -Color: assorted color -Material: metal and plastic -Size: About 35 X 20 X 9 cm/13.76 X 7.86 X 3.54inch - Note: Stopwatch is random style. - This is and top-grade. - Wonderful for teachers to present the experiment. - Real practice in Physics education in fun, cultivate scientific knowledge - Experiments with full and tools. - With these equipments, scientific experiment can exercise children's practical ability. Package list: 1 x counter 1 x set of weight 1 x tweezers 1 x dolly 1 x friction 1 x table 1 x sponge 10 x hook x measuring cylinder 1 1 x transparent cup 1 x handle 1 x heavy object 1 x small compressor 1 x latex tube 1 x liquid internal compressor 1 needle 1 x small needle 1 x force meter 1 x force meter 1 x pedestal 1 x aluminum alloy leverage 1 x 1 x holder 2 x single pulley 2 x double pulley 1 x cotton robe 1 x stop watch 1 x steel x product manual