Keep extra test tubes handy when making your solution. Just keep the filled units in your refrigerator when your need them. Simply swap a full one for the empty. Red bee caps included. Price is for one tube and one red cap.  Test tube measures 5/8" wide, 4" long.

This listing is for a 12-pack.  You will receive 12 glass test tubes and 12 corresponding red caps with a center hole.

We do not sell individual test tubes.