These lightweight metal nose bars easily bend into shape, and have a very convenient iron-on fusible backing to hold them in place. Insert into face masks for a better, more secure fit. Nose Bars, 3-1/2" long and 1/4" wide, 50 pieces. Please note these are lightweight for comfort but may not last through multiple washing machine and dryer laundering - we recommend handwash with soap and airdry to extend their life - i.e. not advised for heavy duty laundering for medical worker use. Great for fashion facemasks for civilians!