All our murrine are made of Murano glass (coefficient 104) and can be used with glass sheet, rods and grits of the same coefficient. Please note: The dimensions are variable. Con description you will find the minimum and maximum diameter that you will find Per the package. Durante the site https://vetro-colorato49482.blogcudinti.com/26522244/top-ultime-cinque-zafferano-notizie-urbano