The Gates Essential Oil Master D hose is a vacuum and pressure hose (SD) for transfer of fuel oil and other petroleum based products in home delivery, commercial & industrial service or in low pressure return lines. Transfer of Refined fuels (commercial gasoline and diesel fuel), oils and other petroleum products. The Gates Essential oil master D hose is ideal for oilfield service truck use. Service life of transfer hoses can be extended by draining hoses after use. Max 50% aromatic content.