The heart of the chemical laboratory is the set of glassware collectively called "the kit." It consists of several round bottom flasks, a claisen adapter, a still head with thermometer holder, a thermometer, a condenser, a vacuum adapter and a separatory funnel (sep funnel, for short). These pieces each have ground glass joints of the same size, so that the set can be put together in a variety of ways, depending on the process being done. For the production of a quarter to a third of a pound batches, 14/40 size ground glass joints are used. Also necessary are one each of the following sizes of round bottom flasks: 3000 ml, 2000 ml and 500 ml; and two each of 1000 ml and 250 ml. Two condensers are also required, both of the straight central tube variety, one about 35 cm in length, the other about 50 cm in length.

化学实验室的核心部件是被称为装置组的玻璃仪器成套用品
它由若干圆底烧瓶，克氏蒸馏头适佩器，一个顶部固定的温度计支架，
一个温度计，一个冷凝器，一个真空适配器和一个分液漏斗构成
（缩写为sep funnel）.其中每一个元件都设有相同大小的磨砂玻璃连接口
所有这个装置可以依照进程的需要任意的拼装组合。
在制作由1/4 磅批量到1/3磅的批量的转换过程中则需使用14/40大小的磨砂玻璃
接口。同样需要3000ml，2000ml，和
500ml的圆底烧瓶各一个 还有1000ml和500m的圆底烧瓶各2个。两个冷凝器也是必须的
两个中心直管的类型一个是大约35厘米长，另一个大约50cm长。