AquaNation 53mm Threaded/Screw-On Caps Lids for 3 and 5 Gallon Drinking Water Bottles Jugs Serum Jars Glass Containers (6 pack) White

53mm cap - Inner Diameter: 55mm, Outer Diameter: 50mm These caps are made of food-grade plastic, making your health a top priority. Caps include a white liner to assure a tight seal between bottle & cap. Features ribbed sides for ease of grip when removing cap. Replacement Caps are for use on 3-gallon and 5-gallon water bottle jugs. Please measure jug for proper cap size selection. These durable caps are leak proof to keep water safe from contaminants and prevent spills from occurring 6 caps included. For proper fit, measure the OUTSIDE diameter at the top of the jug's neck opening. The size 48mm cap will work for jugs with an 48mm OUTER diameter neck opening, and the size 53mm cap will work for jugs with a 53mm OUTER diameter neck opening. These are also THREADED caps, and will only work with THREADED jugs. Our Brand is Trademarked, purchased with confidence.