This item is for the ComfortSelect Nasal Mask by Skynector, It is one of Skynector Original Nasal Masks
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<br />Mask Sizes
<br />Size L,  Length(mm) 202,     Width(mm) 121 ,   Height(mm) 125.5
<br />Size M, Length(mm) 193.5,    Width(mm) 116,    Height(mm) 123
<br />Size S, Length(mm) 192.5,    Width(mm) 112,    Height(mm) 125