Joint adapter for microscale applications.Supplied with a nylon compression cap and Viton O-ring to form a vacuum tight seal.To use as a syringe port,replace the O-ring with PTFE -lined septum.Cap accommodates a 5.0–7.5mm O.D. thermometer. ● Material:Borosilicate glass ● Color:Clear ● Hole cover:13 mm ● O-rings,inner diameter × width:6.07 mm × 1.78 mm ● Accessory:Supplied with one Nylon cap (C3507-02) and one O-ring (R3508-04)