Manufacturer of the "Load Assist Block"®
®
The BARSCO LABs (Load Assist Blocks) are made tough from specially formulated poly-urethane foam … These 10" x 8" x 4.75" interlocking molded blocks conform to the shape of the load allowing for a tighter and more stable tie down.
"LABs" are the solution to Federal Statute Part 393 pertaining to tie down of uneven loads.