Briggs and Stratton Air Filter Part# 399877S

Briggs and Stratton Air Filter part# 399877S is a paper element filter that measures 4-5/8" square. We only found one model series listed as using this filter, that model series is 100700. There may be other models that use this part that we do not have listed here. All Briggs and Stratton parts are type number and sometimes code number specific. Please refer to a parts breakdown for your specific model, type, and code numbers to assure that this part will work on your motor.