Fullness99 via eBay offers the Tire Pressure Monitor Valve Stem Cap 4-Pack for $2.46 with free shipping. That's tied with our mention from last month and the lowest total price we could find by $1, outside the price below. These caps fit on any standard size tire valve stem and provide visual alerts of each tire's pressure. They'll ship from China, with an estimated delivery time of three to eight weeks.

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