Can collapsible metal with pump, Collapsible metal can with a black no. 8 stopper with 1 hole & 1/4 fitting with 1 3/4 in opening with cap. Comes with hand operated vacuum pump. Used for pressure principals within the class room, Measure: 9 3/8in x 6 5/8in x 4 1/8in
Dry Field Mapping Kit, includes cork-covered base, 30cmx26cm; pad of 25 sheets pre-printed conductive paper 28cmx21.5cm; pad of 100 sheets preprinted paper for drawing fields; ten metal-headed push pins; a silver conductive pen
Electric Mobility Experiment Set, 6 Different Models Can Be Built With One Chassis, Examines The Strengths And Weaknesses Of Each Solution, Compatible With All Other Horizon Kits, For Measurement, Etc, Includes fixed Steering Function At Front Of The Vehicle