Policar bridge support to create an elevated track crossover section, 4pcs.Hard high grip plasticPlastic is hard and firm, with a special surface texture to guarantee excellent grip, even without traction magnets.Rust resistant steel rails...and good conductivity, too.Lane spacing is 9 cm (3.54”)The ideal lane spacing for 1/32 racing.Special track system geometry!Easier to create your own circuits. In the POLICAR track, any constant radius 90° turn can always be replaced with any other constant radius 90° turn: regardless of whether you're using R1, R2, R3, or R4 pieces! To put it simply: all of the curve assembly pieces are interchangeable. So, if for example you grow tired of your layout, you can easily replace a 90° R1 turn with a 90° R3 without trouble. Guaranteed by geometry.