Fangrui Product Details [ 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 [ 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 [ Widely Used ]: These Pen Refills Can Be Widely Used In Industrial Processing And Production Of Wood, Metal, Paper, Clothing, Glass, Ceramics, Etc., For Marking [ 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 Colour:as Shown Material:plastic Package Contents: 24 X Solid Carpent