This Black Bull Vapor Pen is quite versatile and is equipped with a replaceable heating coil that is made out of ceramic material. With this replaceable heating coil it's easy to purchase replacement parts at low cost. It's easy to access the coil for loading concentrates. Just like our other pens which are specifically made for her concentrates. This coil is easy to access and load concentrates. This vapor pen is and designed for easy maintenance and will deliver a large hit without overheating. We have been able to set ourselves apart from other vaporizing pens that's why we back out product with a full one year warranty for our batteries. This vapor kit comes with a carrying case that holds your USB wall charger, pen and battery atomizer plus a special tool that makes loading your concentrate easy. For this model we like to recommend our loading screen which lets you pack a much larger load without the need to constantly reload your concentrates. Don't forget our fabulous E-liquids which adds great tastes and flavors to your smoke.