Features of Magnetic Cartridge Stylus: Fixed hole distance of recording head: 13 mm (measuring distance between two holes). Four wiring marks on the head: R+, R-, L-, L-. Standard wiring color for turntable: R+ = red, R- = green, L+ = white, L- = blue. Recommended tracking force: 1.5g2g, adjustable based on personal preference. Features of Turntable Headshell (4 Pin Contacts): Compatible with phono turntable headshell and other turntables with S- or straight tonearms. Plated 4-pin contacts. Includes four color-coded OFC (oxygen-free copper) soft lead wires with gold-plated terminals for improved sound clarity. Terminals housed in clear sleeves. Model Number: Headshell Motor: For turntable Speeds: 33, 45, 78 RPM Stylus Type: Magnetic Cartridge Stylus Color: Black Material: Metal + Plastic Package Contents: 1 x Magnetic Cartridge Stylus with LP Vinyl Needle 1 x Replacement Phono Turntable Headshell Note: Light and display differences may cause slight variations in color between the product and the image. Measurement error allowed is +/- 1-3 cm.