This instrument incorporates the proven 4-stroke gradient process. The built in timer automatically turns it off and removes the lenses from the tint when the cycle is complete, giving the technician time for other tasks. Produces gradient lenses only. BPI 4-Stroke Gradient III is made of 100% low maintenance stainless steel. The 4-Stroke Gradient III has a one year warranty. In the 4-Stroke gradient process, the lenses are lowered further into the tint bath on each stroke. After the fourth stroke the gradient repeats the cycle. This mechanical process creates a smooth gradient effect.

Mounting flange:

If the Gradient is not to be used with a BPI tinting machine, then please check the option "With mounting flange" so that the gradient unit can be mounted to a surface supplied by the user.

If the Gradient will be used with a BPI tinting machine, then the gradient unit can be inserted directly into a hole in the back of the tinting machine, and you should click the option "No mounting flange."