The Great GRAMMA , built on the success of GRAMMA, the Great GRAMMA is almost 30% bigger to float large speaker cabinets.

Now 4x12s, 15" or 18" speaker cabinets will benefit from the awesome Great GRAMMA.

Only Great GRAMMA can handle the big rigs!

Quantity: (2) Risers Per Box

Dimensions: 30" long x 19" wide x 2.75" high

Weight Limit: 300 lbs.

Related Items: GRAMMA: Amp/Monitor Isolation Riser | Great Gramma - 4 Pack