CeNtRa Science (Holding) LTD was a taiwan based company which have 17 yeas experiences for producing MOV . Our brand is "CNR" which carries out ISO9001:2000 quality control system and ISO14001:2004 environment control system . All series products have passed the international safety approval of many organizations, such as UL3rd, CE, VDE. Now we are the largest Varistor manufacuture both in taiwai &china with the excellent quality, sufficient quantity and competitive price in order to occupy market-leading positions our Rich â??experienced R&D team researched a full series of varistor to satisfy the highly demanding society.