金属适配器，喷管顶端部位与顶针的密封采用金属面密封，不含橡胶塑料件，塑料枪身，使用寿命长，对细小的缝隙也能准确控制流量，耐老化、耐磨性好。Metal adapter, plastic rifle body, hard seal without any plastic parts between the top of the nozzle and the needle, it can well and accurately control the flow towards the slender or tiny gaps with reliable quality and perfect sealing performance，aging and wearing tolerable with longer useful life.