This uniquely designed cartridge from DazzLeaf has a large 2mL oil capacity and a universal 510 thread to attach to a cart battery. The full ceramic build gives it a super high quality feel to touch, is strong but lightweight, and means no metal is touching your oils. The full ceramic coil can hold a high heat temperature, for high quality and long-lasting vapor. The cartridge is top-filling, and extremely easy to fill and transparent design makes it easy to see how much oil you have left. Specifications: Brand:Dazzleaf Unit: 5pcs/pack 2mL Capacity 510 Thread Oil Intake Hole Size: 1.8mm*4 Resistance: 1.2ohm Airway Size: 1.5mm Weight: 12.5g Reservoir Material: Glass Ceramic Center Post Heating Core: Quartz Ceramic Screw On Top Round Ceramic Mouthpiece 510 Thread & Copper Base Core Temperature Dependent of Voltage Airways compatible with most cartridge batteries Silicone Tips & Silicone Bottoms Pre-Applied External Printing on Reservoir