The Kohler Plumbing Fixtures Roughing-In Service Reference Book is a vintage collectible item that provides valuable information on plumbing fixtures installation. Made in the United States, this reference book is a unique tool for plumbers and collectors alike, offering insights on various plumbing roughing-in techniques and Kohler fixture installation methods. Perfect for those interested in plumbing history and vintage tools, this book serves as a valuable resource for anyone looking to delve into the world of plumbing fixtures.