The lid of a plane fan vessel is suitable for closing but also for combination with other ground joint components (e.g. dropping funnel, stirring shafts, etc.) due to the standard ground joints.– With one middle neck: 29/32 and three side necks (standard ground): 3 x 29/32 parallel – Pressure and vacuum resistant due to the wall thickness and geometry – Tight closure due to standard ground joint – – The lid of a plane fan vessel is suitable for closing but also for combination with other ground joint components (e.g. dropping funnel, stirring shafts, etc.) due to the standard ground joints.– With one middle neck: 29/32 and three side necks (standard ground): 3 x 29/32 parallel – Pressure and vacuum resistant due to the wall thickness and geometry – Tight closure due to standard ground joint – –