ACM Aluminum 5 in. Inside Box Miter, White

This is an ACM aluminum inside box miter for 5 in. K-style gutters, finished in 30 White. It joins two gutter runs at an inside corner with a clean, factory-formed seam. One piece is included per order; pair it with matching 5 in. gutter, end caps, and hangers.

Key Features:

• Aluminum construction: Formed from aluminum for a lightweight, rust-resistant gutter corner fitting.
• Inside corner fit: Designed as an inside box miter to close inside corners of a 5 in. gutter run.
• White finish: Finished in 30 White to blend with white gutter systems.
• Seamless corner look: Provides a formed corner alternative to hand-cut and sealed field miters.
• Sold per piece: Each order unit is one piece, so you can order exactly the number of corners needed.

Specifications Table:

Fit and Compatibility:

Made for 5 in. aluminum K-style gutter runs; use with matching 5 in. gutter, end caps, hangers, and downspout components. Fasteners and sealant are sold separately.

Frequently Asked Questions (FAQ):

Q: What is included with this item?
A: One aluminum inside box miter in 30 White is included per piece ordered.

Q: What gutter size does it fit?
A: It is made for 5 in. aluminum gutter systems.

Q: How is it installed?
A: The miter joins two gutter runs at an inside corner; joints are typically sealed with gutter sealant and secured with standard gutter fasteners.

Q: Will it rust?
A: It is aluminum, which does not rust like bare steel; follow standard gutter maintenance for best life.

Q: Do I need to buy anything else?
A: Yes, gutter sections, sealant, and hangers or fasteners are sold separately.

Expert Verdict Reviewed by the SuperArbor Pro Desk

A factory box miter is the reliable choice for inside corners because it keeps the corner watertight and square versus a hand-cut strip miter. Match the 5 in. size and White finish to your gutter for a consistent appearance. Apply gutter sealant at all joint seams during installation.

Work from a stable ladder or lift and wear cut-resistant gloves when handling formed aluminum edges.

Order the ACM Aluminum 5 in. Inside Box Miter in White to finish your gutter inside corners.