Brand: NITRA Item: Push-to-connect cartridge Connection: 1/2in tubing For Use With: PAL-P12 compressed air supply module Replacement: Yes Quantity per Pack: 2 Working Fluid: Air or inert gas NITRA pneumatic push-to-connect cartridge, replacement, 1/2in tubing. Package of 2. For use with PAL-P12 compressed air supply module.