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M42 to 30mm to 23.2mm Microscope Adapter Camera Eyepiece Tubeitem number: 224158403124The Top male thread is M42*0.75 The outer diameter of the tube is 30mm the inner diameter is 23.2mm to accept biological Microscope tube and the end female thread to accept C-mount. full metal-----Aluminum alloy  
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maintained by blekenbleu |