Ìwò àpapọ oto mẹrin-ihò oniru, differentfrom ibile Belii nkan. pese imudani igun-pupọ, ki awo iwuwo ko rọrun lati yọ kuro, rọrun fun ikẹkọ grp ọwọ oriṣiriṣi.
1. Oto 3 dimu contoured design
2. Ere urethane dada ti a bo
3. Awọn ọwọ ọwọ ti a ṣe ni pataki imukuro awọn geje ika ati gba laaye fun sisọ deede
4. Fi sii irin alagbara, ati iwọn ila opin ti iho jẹ 50.6mm + -0.2mm