This ceramic coil vape cartridge is made of Glass and Metal and comes with a screw on Metal mouth tip. These carts are our best selling carts for thicker oils. Cartridges come empty and ready to fill.,, • Capacity: 1ml, • 510 threading, • Ready to be filled, • 100 units per box, • Aperture size = 2.0mm x 4, • Mouth Tip: Gold Metal