The Bicycle Inner Tubes are a pair of 16" x 2.50/3.00 Scooter Butyl Black Cat tubes made of rubber. They have a smooth valve stem, a removable valve core, and fit tire sizes from 2.50"/3.00". With a valve angle of 0d and a valve length of 33mm, these tubes are designed for use with Schrader valves and come in a stylish black color from the trusted brand Black Cat. With a unit quantity of 2 and a part type of tube, these tubes are a reliable choice for cycling enthusiasts. Please view all photos. Zoom in on photos for a close-up view. Thank you for your support! I work hard to provide the best customer service possible. If there are any issues with a purchase, PLEASE CONTACT ME directly through messaging. I will always do my absolute best to resolve any issue and be honest and fair in any situation. IF YOU BUY MULTIPLE ITEMS FROM ME - PLEASE utilize the cart feature pay for everything at one time! This saves you time helps me save on fees and keep my pricing low! FAST SHIPPING!!! THANK YOU SO MUCH FOR CHECKING OUT MY STORE, PLEASE COME BACK!?