The I.D. to I.D Diameter Pipe Coupler (GR-CP-78A) is a practical and versatile solution for connecting pipes of varying diameters. Available in 4, 5, 6, and 7-inch sizes, this chrome coupler is 8 inches long and fits most makes and models. The aluminized finish ensures durability and longevity, making it a reliable choice for any plumbing project. With its easy-to-use design, the I.D. to I.D Diameter Pipe Coupler is a must-have for any DIY enthusiast or professional plumber.