[ Bright color pen refill ]: Wooden pen refills have bright and uniform colors, smooth lines, and no agglomeration or breakage; Especially suitable for marking work on dark surfaces [ Widely used ]: These pen refills can be widely used in industrial processing and production of wood, metal, paper, clothing, glass, ceramics, etc., for marking [ Waterproof Material ]: These white, blue, and green pen refills are made of safe and waterproof wax material, with a melting point of up to 194 ° F, which is not easy to melt and has a long service life [ Accurate and practical ]: The 2.8mm pencil lead is more suitable for deep hole drawing than other pencil leads; It is a good helper for your construction work; Each kit is packaged in a portable plastic box to prevent damage to the refill and facilitate storage [ Package includes ]: 4 pack pen refill sets, including 8 white, 8 blue, and 8 green pen refills, which can be according to your needs, Manufacturer: Akfldms