Original: $0.16
-63%$0.16
$0.06The Story
LEGO® Arch 1 x 4 is a curved structural part with four top studs, rectangular end supports, and an open underside arch, identified by MPN 3659 for accurate part matching.
LEGO® Arch 1 x 4 Shape and Structure
The part combines a straight 1 x 4 top layout with a rounded lower opening, making it useful for doorways, window frames, bridge details, decorative supports, and architectural builds.
Curved LEGO® Arch Part Details
- Four-stud top surface for layered building
- Curved underside opening for arch-shaped construction details
- Block-style end supports for stable visual structure
Browse more curved and architectural building elements in the LEGO® arch piece collection.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
LEGO® Arch 1 x 4 is a curved structural part with four top studs, rectangular end supports, and an open underside arch, identified by MPN 3659 for accurate part matching.
LEGO® Arch 1 x 4 Shape and Structure
The part combines a straight 1 x 4 top layout with a rounded lower opening, making it useful for doorways, window frames, bridge details, decorative supports, and architectural builds.
Curved LEGO® Arch Part Details
- Four-stud top surface for layered building
- Curved underside opening for arch-shaped construction details
- Block-style end supports for stable visual structure
Browse more curved and architectural building elements in the LEGO® arch piece collection.























