What demension are the tubes

Look up BT20 and BT50 tube sizes. The 20 is the size of an regular Estes engine. The 50 is the size of a Estes D engines

Does it include 29mm engine tubes?

No, the largest is BT50. 24mm. That is the diameter for D engines.

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BT5-BT20-BT50 Engine Mount Parts - Estes

Product ID: 164767778

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📏3 tube sizes: 50mm, 70mm, 100mm

⚙️Compatible with BT5, BT20, BT50 engines

🛠️27 precision parts included

Description

🚀 Build your rocket’s heart with precision and power!

COMPLETE MOTOR MOUNT KIT - All essential parts to build up to 3 motor mounts per engine size—no missing pieces, no delays.
PRECISION ENGINEERED TUBES - Durable tubes in three lengths (50mm, 70mm, 100mm) ensure a perfect fit and reliable performance.
LIGHTWEIGHT COMPACT DESIGN - At just 200g and compact dimensions, this kit fits seamlessly into your rocket-building workflow.
VERSATILE ENGINE COMPATIBILITY - Supports 13mm, 18mm, and 24mm engines (BT5, BT20, BT50) for ultimate rocket customization.
EASY ASSEMBLY WITH LOCKING RINGS - Includes locking rings and Mylar hook mounts for secure, professional-grade builds every time.

The Estes BT5-BT20-BT50 Engine Mount Parts kit includes 27 high-quality components designed to build up to three motor mounts for 13mm, 18mm, and 24mm engines. Featuring durable tubes of varying lengths and secure locking rings, this kit offers versatile compatibility and easy assembly for model rocket enthusiasts aiming for professional results.

Specifications

Product Dimensions	25.91 x 16 x 2.54 cm; 199.58 g
Manufacturer recommended age	4 years and up
Item model number	EST3181
Language:	English
Number of pieces	27
Assembly Required	Yes
Batteries Required?	No
Batteries included?	No
Material Type(s)	Paper and Metal
Colour	Yellow
ASIN	B01A7VGWIK

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