The Yocan Nestor QTZ I Replacement Coil is designed specifically for use with the Yocan Nestor 510 Dab Pen Vaporizer. This pack includes five premium replacement coils to keep your device performing optimally. Key Features: Compatibility: Official replacement coil for Yocan Nestor 510 Dab Pen Material: Premium Quartz Construction Style: Pancake-style Coil Design Thread Type: 510-threaded Connection