All Powerhose Plus lines are factory made, tested and approved by TUV and DOT. Lines use the highest quality Teflon tube with Stainless steel over braid. The lines are covered in clear PVC as standard. Coloured PVC can be specified as required. The Powerhose Plus fittings simply screw on to the lines stainless steel 1/8 BSP swivel nuts. This gives perfect alignment.