This is a Sebaceous gland

Sebaceous glands are tiny exocrine glands in the skin that secrete an oily, waxy substance called sebum. This sebum is crucial for lubricating and waterproofing the skin and hair. In most areas of the body, sebaceous glands are connected to hair follicles. Some sebaceous glands exist independently of hair follicles and secrete sebum directly onto the skin's surface. Examples include those on the lips, eyelids, nipples, and genitals.

Small oil-producing glands called sebaceous glands are located in the skin and are typically connected to hair follicles. They release sebum, an aqueous fluid that keeps the skin and hair hydrated and prevents drying out. By acting as a natural defense against bacteria and environmental harm, these glands are crucial to the preservation of healthy skin.