# FLEX Cap The FLEX Cap follows the 10-20 system and has 74 positions. The cap has two pockets for securing the FLEX Controller in place — one is below Cz and the other is lz. The FLEX Cap is made from black high-comfort material and is available in sizes 54cm, 56cm and 58cm. A pre-configured version is available in the 56cm size only. \ If you need a different size, hole position, material, or cut, please contact [EMOTIV Support](https://www.emotiv.com/contact-support/). ![](https://lh7-us.googleusercontent.com/I28SfgC1MRy1vTgmDeNU_M2ZkwmR-kNIij7BSGg4_rmr7WuzXlWgHdBVQ9N0bPK3NDE1cZUzsAD0y5DPmq9rJcf8fIOhUV8MHO_XkWkz47K_ssqJYVRyj4iPfMSewCpklSNWZOAx1LAuBmVW58ZuvAc)