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OptiClimate 15000 PRO3 and PRO4 Split cooling hose. Extra cooling hose to extend the OptiClimate 15000 PRO3, PRO3S or PRO4 Split and EX. The cooling hose consists of a set of two hoses. The price is per meter. For example, if 15 meter cooling hose is required for an OptiClimate 15000 PRO3 or PRO4 Split you would need to order this article 7 times (for 7 meters extra). A 8 meter cooling hose comes standard with an OptiClimate Split Unit. A 15 meter cooling hose comes standard with an OptiClimate Split EX Unit.