Fidnor all glass carts which is pure ceramic coil,cotton free,brings more purer oil taste,and heavy hitting.
We made negative pressure test to be sure all the carts no leaking.
Before shipping,our QC team check every pc strictly to avoid there has defective one.
0.5ml and 1.0ml optiona,there has 2ps 2.0*2.2mm intake holes,equeali to 4ps 1.6mm round holes.
Suggest use for 60-80% thickness oil.too thin or too thick not fitable.
As customers oil different,welcome to try samples first to be sure our carts works well for you oil.