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. Per mezzo di description you will find the minimum and maximum diameter that you will find Con the package. Sopra https://jaidenzcbxr.blogrelation.com/32535142/5-semplici-dichiarazioni-circa-bicchieri-explained