The LIVORSI 4-5/8 Inch Race Rim 8000 RPM Tachometer DCL8000PLBKRR is a high-quality tachometer designed for boats, providing accurate readings up to 8000 RPM. With a compact size of 4-5/8 inches, this tachometer is perfect for use in a variety of marine applications. ItsRace Rim design allows for easy installation and reliable performance, making it a valuable accessory for boat owners looking to monitor their engine's speed and efficiency. As Pictured