This item made for two part as picture show.
This auction is for one high quality 1x C-mount Adapter Camera Digital Relay Lens with Canon EOS camera adapter
Fits all Canon "EOS" Film or Digital SLR & DSLR Cameras including (digital models) 1D (all), 5D (all), 6D, 7D, 10D, 20D, 20Da, 30D, 40D, 50D, 60D, 60Da, 70D, 100D, 300D, 350D, 400D, 450D, 500D, 550D, 600D, 650D, 700D, 1000D, 1100D, D30, D50, D60, Rebel, Rebel XT, Rebel XTi, Rebel XS, Rebel XSi, Rebel T1, Rebel T1i, Rebel T2. Rebel T2i, Rebel T3, Rebel T3i, Rebel T4, Rebel T4i, Rebel T5, Rebel T5i, X6i, SL1.
and this auction with 2 adapters: 23.2-30mm and 23.2-30.5mm ,so it will fit 23.2mm,30mm,30.5mm microscope tube.
High quality and bid it confident.
Directed from factory,welcome wholesaler!!