Single Lane Radius 3 Curve Outer Borders 22.5 x 4 SAFETY NOTICE Warning! This product is not suitable for children under 3 years because of small parts which could present a choking hazard. Some components have functional sharp edges. Handle with care. This product is intended for indoor use only. The transformer is not a toy- \"it's a transformer for toys.\" Before use, check that the transformer is the correct voltage for your mains electricity supply. Only use this product with the recommended transformer.