These Pulsar full ceramic coil cartridges feature a ceramic bucket heating element which works very well with thick oil concentrates. The ceramic heating element provides high quality flavour and performance. Each cartridge is made with the best quality materials including a transparent glass chamber and stainless steel connections. *Please Note: Cartridges have a 'click & lock' design and are not refillable. Once the mouthpiece has been clicked into place it is not removable. 510 Tank Features: Use: Concentrates 1ml Capacity Click & Lock Design (Single Use) Ceramic Coil Cartridges Full Ceramic Build Universal 510 Threading