Spaceballs Expansion Joint

This simple accepted expansion joint is the inexpensive solution to your age-old problem:

Automatically center panels in the assembling process.
Expand and contract as the panel does.

Eliminate panel rattle.
Help to eliminate the cracking of glue joints.

Space Balls will cut out most major call-backs on solid or flat panel doors.

US Patent No. 5317853

Canada Patent No. 2115722