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The Allied #4 Bone is a precision mounting insert designed for spa and hot tub installations. Built for professionals and DIYers alike, it provides a reliable anchor for spa components with a compact bone-style profile and a precise 1-3/16" mounting hole.
Benefits: By delivering a stable anchor for air button assemblies and other spa controls, the Allied #4 Bone helps reduce movement, improve seal integrity, and simplify maintenance. The precise hole size supports easy installation and consistent performance in humid, wet spa environments, making it a dependable replacement part or upgrade for Allied spa systems.

