Superior quality artist-grade pencils made of wax Strong points and longer-lasting sharp points are produced by dense, hard lead. While sharpening, dense lead keeps things from breaking. Rich, creamy texture and smooth, even blending are produced by wax-based lead. Set of thirty premium pencils in three color volumes of ten pencils each. Series 1 (CI-RTA-30C), Series 2 (CI-RTB-30C), and Series 3 (CI-RTC-30C) Value sets for Tombow Irojiten Color Pencils. First Series: CI-RTA-30C Pale I, Vivid I, and Deep II Series 2 (CI-RTB-30C) are the tones. Pale II, Deep II, and Light Grayish I Series 3 (CI-RTC-30C) are the tones. Fluorescent, extremely pale, and dull in tone. Made in Japan