Need to replace a valve stem on a small tire? This SUTONG valve stem is made for 4.10/3.50-6 size tubes, commonly found on lawn mowers, garden carts, wheelbarrows, and other small equipment. It's a TR13 type, which is pretty standard for these applications. Just remove the old stem, insert this one, and secure it with the nut. Helps maintain proper air pressure and prevents leaks. Made from durable materials to handle outdoor use. Keep a couple on hand for quick repairs so you're not stuck with a flat tire during yard work. Fits most tubes with a 0.453\ hole diameter. Simple, affordable, and does the job. Whether you're a homeowner or a small equipment repair shop, these stems are a handy part to have in your inventory. No more waiting for parts—fix it yourself and get back to work.