... Factorys IntroductionNSB Electronic Manufactory, specializes in different crystal case, mobile phone case, TPU case, silicon case, Transparent case ... Dept., R&E Dept., Sales Dept., QC Dept., Personal Dept. and Financial Dept. these years ,Through technical personnel ... for the professional production of mobile phone crystal covers, mobile phone case, TPU case,, mobile phone protection covers, silicon ...