The TUSA replacement mask strap fits the following Tusa Masks :
M17 Concero
M28 Geminus
M24 Power View
M41 Freedom Quad
M210 Panthes
M211 Freedom One
M212 Freedom Ceos
M1001 Freedom HD
M1002 Freedom Tina
M1003 Freedom Elite
M1007 Paragon S
M2001 Paragon
M3001 Freedom Tri-Quest
The TUSA replacement Strap is a must for any divers save a dive box.