We carry instruments to clean, grade, and test jewelry and loose stones including gold testers, jewelry cleaning supplies, moissanite & diamond testers, diamond grading equipment, gold testing kits, loupes, diamond supplies, gemological instruments.

Dongguan HongTuo Instrument Co.,Ltd has been specializing in density testing field on developing, innovating and producing since the year it was establised. has devoting to provide densimeter with high precision, easy operation good durability for years. Nowadays it&＃39;s brand ...

Welcome to visit the website! We&＃39;ll offer you highest quality and best service sincerely.Our company is specialized in exporting universal testing machine, environmental test chamber, rubber/plastic/film shoes/leather cable enamelled wire package/carton cement concrete ...