This set includes two essential guitar cleaning products: the ultimate lemon oil for fretboard care and a string cleaner & conditioner. The yellow bottle contains Fretboard 65, which rejuvenates and protects the fretboard, leaving it clean and nourished. The black bottle features Ultraglide 65, designed to clean and condition guitar strings, enhancing their longevity and playability. Both bottles are well-sized for easy handling and storage, making them perfect for guitarists who want to keep their instruments in top-notch condition.