The SPRK Ceramic Cartridge by PCKT is an empty refillable cartridge designed to get the best flavor out of your concentrates. The SPRK Ceramic was built completely out of Ceramic, ensuring that none of your oil or concentrates ever touch metal or other materials. This patented cartridge features dual ceramic core technology making it perfect for multiple uses. Features: 510 threading Dual TruCeramic Core. Meant for re-use 1.5 Ohms Ceramic core, stem and mouthpiece with a Stainless Steel connection plate refills 4 to 7 times pending type of extraction used Thin to thick. The Ceramic SPRK heats up and cools down extremely fast, making it good for thinner, more viscous oils works with PCKT One Plus & Other 510 threaded devices