Polydron Engineer Class Set - 250 Pieces 10-7060, 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. Gears have simple ratios (8, 16 & 24 teeth), so lots of models can be invented. Lots of new engineering components included. Unique D & T product provides clear links between maths and engineering. Supplied with work cards. Fully tested by schools and experts. Perfect for STEM. 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 Stub Axle Connectors,. 12 Squares,. 22 Squared with circular strut hole,. 10 Squared with strut hole,. 40 Frameworks Squared,. 20 Double Frameworks Squares,. 14 Frameworks Rectangles,. 24 Frameworks Right Angle Triangles,. 8 Frameworks Equilateral Triangles,. 4 Octagon with cut-outs, 1 2m Long Cord,1 2m long cord with clip,. 1 x 3 Hole Linkage,. 4 x 7 Hole linkage,. 8 Cams,. Work Cards & a Gratnells Tray. *Warning: Choking Hazard due to small parts and strangulation hazard due to long cords*. Each square piece measures 7.5 x 7.5cm. Age 9+.
