New Vintage The Tavia 8000 Mini Valve Spring Tester is a precision hand tool designed for measuring the spring rate of automotive valves. With a range of 0-600 psi, this tester is ideal for ensuring accurate and efficient engine performance. The compact size makes it easy to use and transport, making it a valuable addition to any mechanic's toolbox. Made by Tavia, a trusted brand in automotive tools, this product guarantees quality and reliability for all your testing needs. Free shipping adds to its convenience and value for money.