4×4×6 Window Frame, Sloped, Convex (Part 4741)

Custom LEGO part image © 2025 Tom Alphin / Brick Architect.
The angles align with a stack of three bricks with 45° slope, but the actual slope angle is +/- 48.5°.
"In 1984, #6971 Inter-Galactic Command Base included two stacked roof windows 4x4x3 which created a triangular window frame. It looked great but did not make for a stable build, and so two years later [this part] was introduced."¹
1. Tim Johnson, LEGO Space: 1978-1992 (Dark Horse Books, 2023), page 89.
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Printable LEGO Brick Label
Requires a compatible Brother Label Printer — learn more at brickarchitect.com/labels.
New Label! Not included in legacy LEGO Brick Labels collection.
Date Added: 2024-08-14 10:35:59
Date Modified: 2024-08-15 09:27:32