Tubing sizes: 1/2" OD x 3/8" ID
                         5/8" OD x 1/2" ID

What does OD & ID mean?   OD means Outside Diameter and ID means Inside Diameter.
To determine the correct size needed for your existing pump measure the top of the pumps spout across. This will give you the diameter for the ID measurement for which the tubing should be.

Here's a TIP!
To decrease a 5/8" OD tubing you can slide a 1/2" OD tubing inside the 5/8" tubing making it smaller and giving you more pressure. The same goes if you'd like to increase water flow. Add a 5/8" OD tubing over a 1/2" OD tubing!

*You may buy tubing in one continuous length, every 12" is $0.50 cents, black tubing is extra. For a 2' tubing you would order 2 in the quantity box. Please mention you want the tubing to be continuous in the extra comments field at check out

NOTE: Black tubing is an additional $0.30 per foot and comes in total lengths from 1' to 6' only.

Use black tubing for black or dark slate tier sets!
Use clear tubing for Ice Rock or where you need a transparent effect.