Exhaust Joint

Standard ground glass instruments have good sealing performance, and are more suitable for certain volatile and toxic substances, or some organic substances that are not suitable for contact with rubber stoppers. The standard grinding mouth is divided into two types: frosted and non-frosted (i.e. vacuum thermoforming. The surface is smooth and the use effect is exactly the same as frosted). However, Arabic numerals are used on the wall to indicate the standard diameter of the vessel. For example, if the upper mouth of a vessel is 24, then there is a 24/29 symbol near the mouth. 24 is the diameter of the large end of the cone, and 29 is the axis. For the length (that is, the length of the frosted surface), you only need to specify 24 when purchasing. The shaft length of the existing products is the domestic standard shaft length and can be omitted (purely handmade products, if there is any error, please refer to the product received)