The Milton Industries MI785S Milton (S-785) 1/4" FNPT Female T-Style Air Compressor Quick Connect Fitting Coupler, Single is a quick connect fitting coupler that is designed to connect air compressors. This coupler is made from durable materials and is designed to fit 1/4" FNPT air fittings. This coupler is perfect for use with Milton air compressors. The Milton Industries MI785S Milton (S-785) 1/4" FNPT Female T-Style Air Compressor Quick Connect Fitting Coupler, Single is a quick connect fitting coupler that is designed to connect air compressors. This coupler is made from durable materials and is designed to fit 1/4" FNPT air fittings. This coupler is perfect for use with Milton air compressors.