This 1941 Replica case has flat planes with sharper less rounded edges where the front and back surfaces meet the sides. Lid and the bottom are joined with a four-barrel hinge. Inside unit is flatter with squared edges where they meet the front and back surfaces meet the sides. Black Crackle Finish 1941 Replica Case Shape Lifetime guarantee that &quote;It works or we fix it free&quote; Lighter comes unfilled. Use Zippo premium lighter fluid (sold separately) Genuine Zippo windproof lighter with distinctive Zippo &quote;click&quote; All metal construction; windproof design works virtually anywhere Refillable for a lifetime of use; for optimum performance we recommend genuine Zippo premium lighter fluid flints and wicks All surfaces of the Black Crackle lighter are finished with a jet black textured look. The Black Crackle lighter has rough cement-like feel which is perfect for a sturdy hold.