This is the BT-60 model rocket body tubes by Estes. It’s suitable for ages 10 and older with adult supervision for those under 12.
Includes: Four BT-60 Body Tubes
Inside dimension: 1.595 (40.5mm)
Outside dimension: 1.64 (42mm)
Length: 18 (45.7cm)
Note: Use tube couplers to join tubes of the same diameter, or use as support while cutting.