Cartridge for MAKO PD-1603 or LAWRENCE FACTOR X65627. This industry standard 27" cartridge has a "MAKO" style connection which is used in many purification systems. Our AIM-627 contains the highest quality molecular sieve 13X and activated carbon in a single cartridge. This filter cartridge is housed in a clear tube with a blue indicator strip allowing the user to monitor the level of saturation.