Estes tubes, light weight, straight and good build quality. Everything you could ask for in a low power rocket tube. Perfect for use as a main body tube and makes for an impressive sized rocket when you couple 2 or 3 together. The BT-80 tube will fit 3 D engines clustered together for a very exciting rocket launch. Shiny coating makes for a decent paint finish but doesn't inhibit glue adhesion. All around great tube.

When I saw that I could use the D&E engine mount with these tubes, the idea for making a variant of the mean machine rocket was born...

I've ordered several of these Estes BT-80 (2) packs, in the past and they are good quality for the price. Great for upscaling several rockets, including the Estes Baby Bertha and the Estes Mini Fat Boy. I resurrected the discontinued Fat Boy, but up powered it to 29mm. It should see around 1/4 mile in altitude and good enough for Cert.1 The same can be said about my upscaled Baby Bertha, to a Bigger Baby Bertha. As for motor mounting, these BT-80's will house 1,or2X29mm motors, 1,2,3,or4x24mm motors, 7,or8X18mm motors, or 1x24mm+6,or7X18mm motors. Any more than 2X29mm motor power with these body tubes will require reinforcement. They can also be used for ducted tube fins.