Dear Sirs My name is Maria Fernanda, I wrote from Ecuador, I work in TECNIVIDRIO 2000 S.A. COMPANY, We need to buy a polishing stones with diamond for glass and a bits for glass too. The requeriments for the products is POLISHING STONES INTERNAL DIAMETER ( mm ) EXTERNAL DIAMETER ( mm ) THICKNESS ( mm ) 50 150 3.5 22 150 3.5 INTERNAL DIAMETER ( mm ) EXTERNAL DIAMETER ( mm) THICKNESS ( mm) 50 150 4 22 150 4 BITS DRILLING DIAMETER( mm ) LENGHT ( mm ) 11.3 75 We need this products very urgently, Im waiting for your response Regards Maria Fernanda BecerraTECNIVIDRIO 2000 S.A.Quito - Ecuador