Across International Ai 2L Short Path Distillation Kit with Multiple Receiving FlasksAi Clear2 short path distillation kit features Newly re designed distillation head with larger vacuum jacket for less heat loss during distillation, increased internal diameter for more efficient fractioning and condensation of vapor with zero clogging. PTFE 24 40 thermo inlet adapters with Viton gaskets Ai Heavy wall glassware for durability Vacuum jacketed vapor channel Thermo port on distillation head: 24 40 joint Thermo port on boiling flask: 24