Cabbirrada caadiga ah ee tuubooyinka birta aan daxalka lahayn (SS) way kala duwan yihiin iyadoo loo eegayo heerarka gaarka ah ee ay raacaan waddamo iyo warshado kala duwan. Si kastaba ha ahaatee, cabbirrada caadiga ah ee tuubooyinka birta aan daxalka lahayn waxaa ka mid ah:- 1/8″ (3.175mm) OD ilaa 12″ (304.8mm) OD- 0.035″ (0.889mm) dhumucda derbiga ilaa 2″ (50.8mm) dhumucda derbiga – Dhererka caadiga ah badanaa waa 20 cagood (6.096 m) ilaa 24 cagood (7.315 m) Waa muhiim in la ogaado in cabbirradani ay yihiin tusaalooyin cabbirrada tuubooyinka birta aan daxalka lahayn ee si caadi ah loo isticmaalo, warshado ama alaab-qeybiyeyaal kala duwanna waxay bixin karaan cabbirro kala duwan ama kuwa gaarka ah iyadoo loo eegayo shuruudaha gaarka ah.