Peb 0.8-1mmNtiv nplhaib tuags yog tsim siv siv rab phom rau lub tshuab xaws phom drilling thev naus laus zis kom ntseeg tau tias yog qhov tseeb thiab xwm yeem. Lub sab hauv ntawm lub qhov yog tus thiab dawb los ntawm cov kev txwv, uas tuaj yeem txhim kho kev ua haujlwm ntawm pellet ntau lawm. Peb kuj tseem tuaj yeem ua cov nplhaib ua yeeb yam tuag nrog ntau yam ntawm aperture cov nqi, ua kom cov kev xav tau ntawm cov tsiaj sib txawv, uas tuaj yeem pab ua kom cov zis tawm. Xaiv peb lub nplhaib zoo ntawm cov tuag yuav ua kom cov pellets zoo thiab ntau dua kev ua haujlwm tau zoo.