This closure fits containers with a 38-400 neck finish. The first number is the diameter of the container's opening (in mm). The second number refers to the thread/style/depth of the closure's skirt. Attach our handy pump to 16/32OZ bottle/Jug and keep paint flowing with no lifting, shaking or pouring. It can even be locked when not in use. A Mess-free solution to art and craft projects-keep work surfaces clean and drip-free. Pump paint directly onto your palette or use it to refill smaller bottles when you're taking paint on the go. This pump saves you from lifting and pouring large, heavy bottles of paint. Simply line up the colors in a convenient place and pump to dispense. The dispensing pump twist locks for safe storage. Being able to pump or squeeze the paint will give them a little independence and help to avoid wasting paint and having it all dry out. Perfect for practicing fine motor skills. This pump makes dispensing paint effortless - simply fit onto a 16/32oz jug to make your paint easy to dispense. These pumps are extremely versatile and have been used in the hair care, personal care, pet care and home care industries. They are also popular for shampoos, hair conditioners, lotions, body washes, condiments, syrups, and glues. Size Cap Size: 38-400 Lid diameter: 1.5 inches Pump length: 13.5 inches (can be trim to a size) From lid to bottom length: 11 inches IMPORTANT: If your container’s neck size is not 38/400 it will not fit. Please measure and make sure your bottle’s neck size is 38/400 (38mm or 1.5 inch diameter) before you purchase comfort axis replacement pump. Check Neck Width before purchasing. This pump is compatible with 38 mm / 1.5 Inch (38/400) neck closure. Please measure your bottle's neck to ensure compatibility