Daawaynta ka-hortagga 4 mitir dhererka caadiga ah ee dhererka birta jeexdin ballac ahaan 40mm roller placon leh taper nylon wheel.
Waxaan nahay soo saaraha raad rullaluistemadka birta.Alaabtayada waxaa si toos ah looga iibiyaa warshadaha.Qiimaha jaban iyo shixnadaha waaweyn, waxaan nahay doorashada ugu fiican ee ganacsatada.