SeptaSource utilizes proprietary bonding technology to bond septa to polypropylene caps, while maintaining the low bleed properties of the septa. This unique technology is currently available in 24-414, 9mm and 13-425 screw caps. This technology can be used to bond just about any septa. Therefore if you would like us to bond a septa to cap that is not listed below, click on the link below and tell us what your requirements are.