This is a replacement battery for the MacBook Pro 13" A1331. This is for the 2010 MacBook Pro 13" Model and the MacBook 13" Polycarbonate with model number A1342.
Apple has two different revisions for the screws used to secure the battery. Some models will need the tri-wing screwdriver while others will need an ESD security screwdriver. Check inside your machine which you will need before ordering.