The Tariff Commission issued this report to investigate the merits of imposing a definitive safeguard duty against importations of High-Density Polyethylene (HDPE) Pellets and Granules (AHTN 2017 Code 3901.20.00) from various countries pursuant to Republic Act (RA) No. 8800 (Safeguard Measures Act). In this investigation report, the Commission determined: (a) if the subject domestic product is a like or directly competitive product to the imported product under consideration; (b) if the imported product under consideration is being imported into the Philippines in increased quantities whether absolute or relative to domestic production; (c) presence and extent of serious injury of threat thereof to the domestic industry that produces like or directly competitive product; (d) existence of causal relationship between the increased imports of the product under consideration and the serious injury or threat thereof to the domestic industry. Taking into consideration all the above-mentioned elements, the Commission established a positive determination and recommends the application of the appropriate definitive general safeguard measure on importations of HDPE to prevent the imminent occurrence of serious injury to the Philippine HDPE industry.