Wooden slide stand holder with 5pcs female 18mm Quartz Glass adaptors and 6pcs female 10mm Quartz Glass adaptors. | it can hold 5pcs glass tubes with 18mm stem and 6pcs glass tubes with 10mm stem, rember the size . | material: hard and heavy wooden base keep everything stand on desk stable and safe, and quartz glass holder can bear high temperature and keep your glass tubes tight in the holder . | the holder will stand on the table stably , keep all your glass tubes standing in order .Put the holder on the desk , your glass tubes will be safe and tidy,NO breakage . | please check your glass tubes size before place order ,please check your glass tube is male or female , male bowl suits my female connector , female bowl suits my male connector .this holder is with Female glass connector , ONLY suits for bowls with Male stem , and Rember it is 5pcs 18MM and 6pcs 10mm stem .