Compatible with Spartan model:

STR-23
STR-47
STR-72
STF-23
STF-47
STF-72
SST-27
SST-27-12
SST-48
SST-48-18
SST-60
SST-60-24
SST-72
SST-72-30
SPR-50
SPR-72
SPR-93
SUR-27
SUR-48
SUF-27
SUF-48
SGM-53R

Dimensions: 4"W x 5-1/2"H