GS-125-61-48R-MG-24x47-77.5x20-GSC

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GS = Ground Sleeve:
125-61-48 = W x D x H
R = Reinforced 
MG = Munsell Green
24x47 = Top Opening for Cover W x D
77.5x20 = Top Opening for Switch W x D
GSC = Ground Sleeve Covers.