˙The bottom is made of PP or PC, and the upper cover is made of PC
˙The straight cylinder design increases the internal space, 13% more space than the general round cap type
˙Full vacuum (759mm-Hg) at room temperature can last 24 hours
˙The stopcock is made of PP, and the stopcock valve is made of TF, which can control the air entering speed, and use a vacuum hose with an inner diameter of 6.35~9.53mm
˙With O-RING, strengthen the tightness, no need to apply petroleum jelly
˙With a thickness of 3.2mm temperature resistant partition