VEVOR PEX Heat Transfer Plates, 200 pcs Box Radiant Heat Transfer Plates, 2ft Aluminum PEX Heat Transfer Plates, 1.27 cm Heat Transfer Plates Designed for PEX TubingProduct Features Premium Plates Kit Amount: 200pcs; Material: Aluminum; Length: 2FT; Width: 4. 25"; Good quality product to provide better heat transfer function for radiant floor system. Great Compatibility These radiant heat transfer plates are compatible with most type of 1 2" PEX tubing(5 8" OD). Suit for most brands' PEX, PEX AL PEX or EVOH coated 'Oxygen Barrier' pipes. Effortless Installtion Typically installed in radiant system of under floor