Includes 4ft. of #4 braided stainless steel line, firewall pass through grommet, 1/8" NPT female right angle to -4AN male fitting, -4AN male to 1/8" NPT male fitting, -4AN male to 1/8" NPT female fitting, 1/8" NPT to 1/4" NPT adapter bushing. Recommended for use with fuel pressure gauges. For use with mechanical pressure gauges and for remote mounting of electric gauge pressure senders.