Specifications: 10mm Pole piece pitch Single bobbin Passive Artec products is wide open and allows you to tailor the system to your needs. Artec will help your ideal guitar sounds come true without paying too much money or changing your guitar! MSP 50 is a single coil passive sound hole magnetic pickup that enhances realism and smoothness in your guitar sound. It's slim design can avoid the sound hole obstruction that other sound hole pickup used to. You will not even realize that MSP 50 is sitting on your guitar until you hear the natural acoustic sounds coming out from your guitars. MSP 50 has been designed brilliantly to keep the miscellaneous parts all together. Mounting clamps are permanently attached to the main body with foam rubber covered slots to prevent damage to your guitars. MSP 50 features adjusted pole pieces and unique design of magnetic bar inside for precise string to string balance.