WO 1.25" 20mm Swan 72 degree EP.

[LukeSkywatcher]

Any good for use with Bresser ar102xs scope and Quark?. 

Also for night time observing with same scope.

https://www.firstlightoptics.com/william-optics-eyepieces/william-optics-swan-eyepiece.html

[25585]

What focal length is your Bresser?

[LukeSkywatcher]

460mm

f4.5

[Pig]

No ...... 20mm is way to high power for a Quark ?you may get away with 30mm on a good day.  I am not sure how many times you are going to ask this question Paul and I am not going to answer it again !!! ?