Manifold Blocks are made out of high thermal conductivity material. Block sizes are calculated according to the centre distance of number of cavities required. Thermal expansion and tubular heater wattage is calculated by the processing temperature of the specific polymers material. The spacers and insulation sheet all over the surface ensure minimal heat losses and prevent thermal influence on surrounding sectors. Manifolds are available in standard shapes - I, H, X, Y and in any realizable custom shape, the ranges of manifolds configurations as per mould concepts.