Allows for the construction of 12 different models. 3 to 4 models can be made at once. Gears include simple ratios – 8, 16 and 24 teeth. Each square piece measures 7. 5 x 7. 5cm. The set contains: 4 Baseboards, 6 Small gears, 6 Medium gears, 6 Large Gears, 8 Small pulleys, 4 Medium Pulleys, 2 ‘O’ Rings 410mm, 2 Handles, 2 x 80mm struts, 3 x 90mm struts, 8 180mm Struts,1 x 200mm Struts,3 x 330mm Struts,18 Stub Axles, 8 St
