In excellent second-hand condition

Vixen HR 3.4 mm planetary eyepiece with caps on both ends, original Vixen box
Focal length: 3.4 mm
Eye relief: 10 mm
Apparent field of view: 42°
Extremely high transmission values
Designed for f/8
Suitable even for Newtonian telescopes
5 lens elements in 3 groups
Mounting diameter: 31.7 mm
Locking groove
Weight: 115 g
Made in Japan

User review: https://www.svenwienstein.de/HTML/vixen_hr_3-4mm.html