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UNIVERSAL 15MM TO 8MM ADAPTER - Specifically designed Companyblue reducers to convert any standard 15mm radiator or towel rail valve to fit 8mm microbore pipework effortlessly. PRECISION INTERNAL FIT - These 10x10x10mm brass internal reducers sit perfectly inside your existing compression fittings, ensuring a seamless and professional transition every time. WIDE VALVE COMPATIBILITY - Versatile design that can be used on all Angled, Straight, or Corner 1/2"-15mm valves. A universal solution for modern heating system upgrades. COPPER & PLASTIC SUPPORT - Engineered for maximum flexibility; these couplers are fully suitable for use with both copper and plastic pipework without compromising seal integrity. DURABLE BRASS CONSTRUCTION - Made from high-quality solid brass for long-lasting, leak-proof performance. Each pack includes 2 pieces (1 pair) to complete a full radiator installation.