产品介绍：
产品说明
一般描述
The Supelco packed GC septum nut provides consistent septum tightness, resulting in better sealing and fewer bent needles. The nut contains a needle guide, ensuring that the needle consistently penetrates the septum in the same place, prolonging septum life. The guide also prevents the needle from striking the edge of the column. Each nut is supplied with easily interchanged
