The Builder's Supply offers Phi, the leading manufacturer of countertops, sinks and cabinetry hardware. With advanced technology and superior craftsmanship, Phi produces the highest quality products to meet the needs of the most discerning customers. Choose Phi for superior materials, superior design, superior craftsmanship, and superior customer service. With Phi, you can be sure you're getting the best. Shop at The Builder's Supply to find your perfect Phi solution.