... plastic + metal key ringSize6*2.5*0.7cm,accept custom sizeColor LED color can be chosen(white,blue,red,blue ... ,yellow,green,purple)Logo Accept custom logoArtwork formatPDF,AI etcCertificateEN71,CEMOQ of LED bracelets1000pcsUsage of LED ... carry4. with seamless, screw does not appear, switch is quick Custom logo printed available super bright mini led keychain