Are made of polymer plastics,with the features of antibend,anti-shock,smooth surface,bright color and clear wire casing etc. Name:Botany Bobbin Para:Are made of polymer plastics,with the features of antibend,anti-shock,smooth surface,bright color and clear wire casing etc.With different surface finishing forms.No.LengthOn Inside Diameter Next inside diameter ?MaterialHM-0121012191:38ABS/PCHM- ...