*PLUMBERSSTOCK EXPERT* responded:
Hello! Thanks for your interest in our 1" Type K Copper Rolled Tubing. The outside diameter for a 1" Type K copper tubing is 1.125". Note: outside diameter is always 1/8" (0.125") larger than the standard size designation. If you are all set to purchase this item, just click on Add to Cart. Enter your zip code to get a shipping cost estimate and proceed to checkout to begin the ordering process. Thanks for choosing PlumbersStock.com as your online shopping buddy. Have a great day!