The purpose of this standard is to establish the specifications of a series of burettes with a fixed waiting time of 30 s. (type II burettes) and suitable for the general needs of laboratories. These burettes must comply with precision class A. The specifications included in this standard are in accordance with the UNE 43-301 and UNE 43-304/1 standards. The specifications included in this standard are in accordance with standards UNE 43-301 and UNE 43-304/1. NOTE- The general specifications for burettes are given in the UNE 43-304/1 standard. The particular specifications for burettes without a fixed waiting time are given in the UNE 43-304/2 standard.