★ Longer duration period 0.13mm(4mil) guarantee for 4 years ★ Specially for multi-span film greenhouse No deformation on the greenhouse, no water pockets in use ★ High Light Transmission - High Intensity Sufficient light to promote growth and high anti-aging strength ★ Dust-proof, Algae-proof, Pesticide-proof Effective dust and algae control, long life of pesticide resistantViewed from outside, the lettering of TTPO^® film is positive-goingViewed from outside, the lettering of TTPO^® film is negative-goingViewed from outside, the lettering of TTPO^® film is negative-goingViewed from outside, the lettering of TTPO^® film is positive-going1. Preferably PO crystal clear film for areas with large temperature difference between day and night and short light hours 2. In areas with very strong sunlight, PO diffused film with high diffusion rate is strongly recommended 3. The function of two sides of the film is different，please install the film according to the prints and labels 4. Avoiding thermal expansion and contraction, install the greenhouse in the morning or evening, tighten the film in winter，and loosen it in summer  5. Avoid dragging and rubbing in the process of installation, film-locking should be moderate,not too tight or loose, keeping film surface flat 6. Store the film in a dry shading place within 6 months before installing 7. Greenhouse frame should be sprayed white paint or make the rust-proof treatment, and film contact with the arch rod must not have rags 8. In case of film breakage, use film tape to repair it promptly 9. Avoid frequent pesticide spraying and sulfur fumigation, prohibit long-term contact with rubber or PVC products★ Crystal Clarity ★ High thermal insulation ★ Long-lasting anti-drip and defogging ★ Ultra-high Strength ★ Whole life span duration