・ It is a glass trap ball with a spherical trap.
-There are two types: a C cone -shaped type on both ends, the lower part of the trap, the C -korn shape, and the tip of the side of the side, the common sphere transparent and transparent standard type.
・ The characteristic is that the glass tube is on a downward slope from the upper part of the trap to the side.
-The traps from the upper part can prevent backflow from the lower connection to the inside of the trap.