This borosicilate glass adapter/receiver delivery has A short stem. The socket size is 19/26 and the overall length is 65mm. This adapter is commonly used just after the condensor, and is led into the receiving flask (both not included). Lubricate the ground surfaces of glass joints to precent leakage in use and facilitate separateion. Use a silicone-free laboratory grease and apply a light coat completley around the upper part of the joint. This will protect the joints and keep your glassware good for longer. The glassware is highly resistant to water, neutral and acid solutions, concentrated acids, chlorine, bromine iodine, and organic matters. It can withstand repeated dry and wet sterilisation whitout surface deterioration and subsequent contamination. All glassware is annealed under stricly controlled conditions to ensure minimal residual stress in the products. THe temperature gradient are consequently low, the coefficient of thermal expansion is low, and the glass can withstand higher temperature gradients and also sudden temperature changes/thermal shocks. General precautions when using any type of glassware: – Take time to examine the glassware to ensure that is in good condition. Never use scratched, chipped or cracked glassware. – Wash glassware promptly after use to avoid hard dried residues. – Do not use cleaning brushes which are badly worn and where the metal spine may scratch the glass.