AmScope EP16X23 Pair of WF16X Microscope Eyepieces (23mm)

23 mm Mounting Size (in diameter) 23 mm Mounting Size (in diameter) Wide Field of View Fits four mounting sizes: 23mm, 30mm, 30.5mm, and C-mount (two mounting adapters included) Calibration kit included for precise measurement is includedYou may also like AmScope Two 10X Super Widefield Microscope Eyepieces (Dia 30mm).