Specifications:- Grommet Type #2- Inner Diameter(Hole Size After Setting) 3/8"" (10 mm)- Outer Diameter(Top of Grommet) 3/4"" (19 mm)- Height 1/4"" (6 mm)- Material Iron with Brass Finish. Package Contents:- 10000x Grommets- . Package Content:- 16000x Grommets. Notice: - Washers are Not included, please prepare them before using.- As the grommets size varies, please check your dies and the specification above carefully for best match.