"Specifications: Material: Plastic, Magnet, Copper wire and Zinc alloy Color: Black Size: 4 String Pickup: 10.2x4.9x2cm/4.02x1.93x0.79inch (L x W x H) 4 String Bass Bridge: 8x5.3x1.5cm/3.15x2.09x0.59inch (L x W x H) Weight: 409g Features: 1.The package will include accessories screws, spring and wrenches. This will make it easier for you to replace accessories. 2.This replacement is suitable for 4-string basses. 3. Made of high quality materials, it is a good replacement with a long lifespan. Package include: 1 x Big bass four-string pickup 3 x Screw 3 x Spring 1 x 4 string bass bridge 5 x screws 1 x wrench"