| Component | Meaning & Details | | 24/410 & 28/410 | This is the finish/neck finish specification. It describes the thread size on the bottle neck that the pump screw cap attaches to. • 24/410: A 24mm outer diameter with a 410 thread pitch. A very common size. • 28/410: A 28mm outer diameter with a 410 thread pitch. Slightly larger, for bigger bottles. | | Plastic Lotion Pump | The main body of the pump (the housing, spring, screw cap, etc.) is made of plastic, making it cost-effective and lightweight. It's designed for medium-viscosity products like lotions and creams. | | With External Pump Core | This is a key design feature. Also known as an "Outer Stem" or "Male Stem" pump. The dip tube connects to a stem that is on the outside of the pump mechanism, as opposed to being hidden inside. This often gives the pump a more substantial, industrial, or professional look. | | With Left Right Lock | This is the locking mechanism. To lock the pump (prevent accidental dispensing during travel), you turn the pump head to the left. To unlock it, you turn it to the right (or vice-versa, depending on design). This is a crucial feature for preventing leaks. | |