Features:
Dimensions:Height overall including drain fitting : 3-1/4" (82mm)
Diameter overall lip outside : 4-1/4" (108mm)
Diameter inside (large) : 3-5/8" (92mm)
Diameter inside (small) : 2-13/16" (72mm)
User friendly design：
1.These cup holders feature a nice drain hole on the bottom which can keep the cup holders clean.
2.These cup holders have a foam sticky ring under the top lip,so that you can peel the backing off of to stick the cup holder firmly in place.
3.The bottom has a black padding secured inside.
Make sure that the bottom of the cup is not scratched, and increase friction to reduce noise, the cup will not slide easily.
4.Wide upper and narrow lower design, easy to take cups.
These scientific designs ensure the cups stability of the cup.So you needn't worry about that the cups will be shaking.
How to install：
1.Clean the place where the cup holder will be placed and keep it dry.
2.Put the cup holder into the groove.
3.Link the drain hole and drain-pipe.
4.Stick the cup holder on your boat with the foam sticky ring after confirming the correct position of the cup holder.
Tips: Before installing the cup holder,please wipe the surrounding area and keep dry to ensure the adhesive property of the tape.