4 Pcs 20.87'' Spray Can Nozzle Extension Hose 8 mm Undercoating Spray Gun Flexible PVC Hose for Vehicles Cars Trucks

These work with the InoKraft undercoating gun sold on Amazon. Good spares to have on hand. 10mm X 1 thread size. They are just slightly smaller in diameter than the ones that come with the InoKraft but still too large to go in door drain holes.

Does not include the gun

Using with a Raptor Liner Schutz gun. As other reviewer posted: I used a 23/64 bit to bore out the barrel and threaded with a 3/8-24 tap.

Bought these to use with a TCP global undercoat gun, also found on Amazon. Tip does not thread into either gun (standard or professional version, I have both), so I removed the aluminum tip from the gun, drilled and tapped it and it fits these extensions now. For anyone looking to do the same, I used a 23/64 bit to bore out the barrel and threaded with a 3/8-24 tap. Have not used the extensions yet.

Too expensive for what it is. My fault ordering them