Are you looking for a set of professional, yet Physics experiment equipment? Are you in search of a sturdy, trustworthy tool that can help you? If yes, this is complete for you! Our professional pulley block set must meet your needs. 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. - Made of metal and plastic, durable and practical. - Perfect for any home, school, or laboratory. - A fun way to introduce kids to operate the experimental equipments and have the experiments. - Sturdy and trustworthy tool that can help you to complete your task. - Improves kids' imagination through interactive play. Package list: 2 x counter 2 x set of weight 2 x tweezers 2 x dolly 2 x friction 2 x table 2 x sponge 20 x hook code 2 x measuring cylinder 2 2 x transparent cup 2 x handle 2 x heavy object 2 x small compressor 2 x latex tube 2 x liquid internal compressor 2 needle 2 x small needle 2 x force meter 2 x force meter 2 x pedestal 2 x aluminum alloy leverage 2 x 2 x holder 4 x single pulley 4 x double pulley 2 x cotton robe 2 x stop watch 2 x steel rule 2 x product manual