Viega 15210 ProRadiant Climate Trak 1/2-Inch by 4-Feet x Trak Length Faster and easier than traditional radiant installation and typically reduces energy costs from 10 to 30 percent Minimizes circulation of dust and allergens; proven press technology ensures secure connections 30 year warranty on Viega tubing 3.5" Width; extruded heavy gauge aluminum Snap-in design for 3/8" or 1/2"; ViegaPEX barrier and pre-drilled holes