Black, ribbed disc top cap with 28-410 neck finish and .338" orifice. Commonly used for shampoo, lotion, conditioners, creams, and personal care items. Disc top caps give you the convenience of one-handed operation and are popular in a wide range of wholesale industries from personal care, pet care, household products, industrial products, health and beauty, arts, crafts, hobbies and just about any other market segment. This polypropylene (PP) cap has a high tolerance for heat and is very durable.