MistKing 1/4 Tubing is the tubing used in all MistKing misting systems and is used to connect the nozzles with each other. Need extra 1/4 inch polyethylene close tolerance tubing? Order as much as you need and take extra – you’ll be glad you did! Tubing is black opaque and doesn’t let light through, preventing algae growth. Rated up to 250psi.