The Baader Planetarium Winged Rubber Eyecup II fits eyepieces with barrel sizes of approximate diameter 33.5-34 mm. This is the most common size and fits most standard Plossls, as well as the Baader Genuine Orthos and the Zeiss Abbe-II Eyepieces.
Reviewed by 1 customers
I bought these to put on my 15mm TV Plossls for bino viewing. However they are too big, so I have ordered the EYECP-1 which are slightly smaller and should fit well. These however are great and will gets lots of use on other eyepieces that are on the way.