Hummingbird feeder test tubes with red cap, Set of 6.

Keep extra glass 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.

Tubes are approximately 4" long and 5/8"diameter. (114mm long x 16mm diameter).

► Caps are not sold separately. This is because I cannot ensure an exact fit between tube and cap unless manufactured as a unit. During the manufacturing and quality control process, the tubes and caps are processed to be perfect fit. Caps will not fit tubes from other vendors, and tubes will not fit caps from other vendors.