They are from HPI :
http://www.hpiracing.com/en/part/102365
I ordered them localy :
https://htmodel.sk/hpi102365-tlmice-sportove-big-bore-4ks-1-8/
Dimensions :
Full size ( hole to hole ) : 160mm
Compressed size ( hole to hole) : cca 115mm
Thing to note : body of the damper is from plastic