Hydrofarm Black & White Poly 10' x 10' , 5.5 mil Size & Thickness:10' x 100' - 4 Mil- Roll They are manufactured from Schedule

They are manufactured from Schedule 40 PVC with 1/4″ 304 stainless steel barbed tubing connections

When sulphured

By the end

and promoting healthier growth in general

Hydrofarm Black & White Poly 10' x 10' , 5.5 mil Size & Thickness:10' x 100' - 4 Mil- Roll They are manufactured from ScheduleThe white side is over 90% reflective for use on the walls and floor of your growing area to reflect light back to plants. The black side provides a light resistant partition. Features: Waterproof and tear resistant Use as is or cut to size Available sizes 10' x 25' 5. 5 Mil sheet 10' x 10' 5. 5Mil sheet 10' x 100' 4 Mil Roll 10' x 100' 5. 5 Mil Roll