Martin 41102070 - 94x47x2 Heat Filter, Schott 

Condition: New

As found in many Martin products including:-

Exterior 1200 Image Projector
MAC 500
MAC 550
MAC 600
MAC 600 E NT
MAC 2000 Profile
MAC 2000 Performance
MAC 2000 Wash
MAC 2000 Profile II
MAC 2000 Performance II
MAC 700 Profile
MAC 700 Wash
MAC 575 Krypton
MAC 2000 Wash XB

Can't find the parts you require?  Please contact dennis@movinglightrepairs.com