They are 4.5mm, 6mm, 9mm all 1.25" fit, and two 2" fit, 14mm & 20mm. I have the last 2. The range is made by Long Perng in Taiwan.
These Lanthanum High Definition eyepieces have 30mm diameter eye lenses. Their performance edge to edge in my F5 scopes is sharp, clear and bright. My 14mm shares duty time with my 14mm Morpheus, and the 20mm likewise with a 22mm Type 4 Nagler.
Eye relief and exit pupil behaviour are close between the 14mm rivals, LHD could do with a better eyecup, as I wear glasses. The Morpheus has a better eyecup, is parfocal with its shorther
Comparing the 20 LHD & 22T4 is easier. 22 is heavier, and its eye placement & exit pupil behaviour is more awkward. 20 has the same rubber donut eyecup as my 14, and its eye relief is 17 to 18mm. I remove the eyecup and hover, that just lets me see the whole
In terms of value for money, 14 Morpheus & 20 Orion LHD are my choices. I will post some photos soon.
If anyone has experiences & comparisons with any Orion LHD eyepiece, please post.