Founded in 1996, TopstoneCorp was once an power cord assembly factory. it belong to Gloso Tech Inc. which has 24 years of experience in keeping its mission ,with multi-specialist eye, to offer you comprehensive range of switches and circuit breakers with international standard. Our services cover several applications such as household appliances, power tool, telecommunication, medical equipment, especially for industrial testing equipment, security systems, and protection systems. What we can provide you is more than you expected. We have been recognized as one of world leaders in the low/overload voltage applications market. With dramatic growth of the electronic components during the past few decades. Our products are sold far to more than 50 countries and districts through an extensive sales network. Gloso offers you high quality products with strict quality inspection from tooling to finished products. Quality assurance comes from our common efforts of product