BT-5 White Body Tube. 18" long (45 cm). ID: 0.518" (13mm), OD: 0.544" (13.8 mm) This tube is the exact same size as Estes BT-5 tube

BT-5 Kraft Body Tube. 9" long (227 mm) This tube is the exact same diameter as Estes BT-5 tube - 13mm, - 13.8mm,  227mm,  3g