Semroc Body Tube ST-9(24mm Motor) 4.0"(10.16cm) Long with Engine Hook Slit SEM-ST-940E
Spiral Wound Kraft Paper Tube with White/Glassine Outer Wrap
OD: 0.99"(2.51cm)
ID: 0.95"(2.41cm)
Thickness: 0.024"(0.06cm)
Made in the USA
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Like the slot for engine mounts
Price is right for this item.