Polyethylene Film 
 
1/ 1 Year-5 mil, Clear
light transmission: 90%; light diffusion: 25%
 
4/ 4 Year-6 mil, Clear 
light transmission: 90%; light diffusion: 25%
 
Thermal: 4 Year-6mil AC/IR, Clear 
 
*Can also be purchased in white and black
 
No returns on polyethylene film.