Open Design: Featuring an open cardboard clip structure, this pickup ensures clear sound output with higher sensitivity, making it suitable for a variety of music stylesAlnico 5:This Bass Pickup with Alnico 5 , delivers strong force and pickup performance, resulting clear and rich sound qualityCompatible:This Humbucker pickup designed to fit a wide range of 4 string P basses , for modifications and upgrades to enhance your instrument's performance and sound qualityMaterials:This Guitar Pickup constructed with Steel materials to ensure stability and maintain outstanding performance even after prolonged useFriendly Installation: Easy to install design makes it ideal for DIY enthusiasts looking to upgrade or repair their bass guitars effortlessly Size Chart: 6.75cmx2.75cmx1.47cm/2.66inchx1.08inchx0.58inch : 0.26cm/0.10inch Package Includes: 1 setBass Pickup Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.