Strictly Professional Eyelash & Eyebrow Tint Grey A quality eyelash tint, for professional use in eyelash tinting treatments. Strictly Professional provide the therapist with the opportunity to purchase consistent high quality products at sensible prices. Each eyelash tint is packaged in an economical 15ml tube, for professional use in eyelash tinting treatments. All items are for professional use only. By purchasing any of these items you are confirming that you are a professional qualified therapist.