The Drain Saddle connects the RO system drain tube to the sink's drain pipe. Air gap installations typically require a 1/4" drain saddle when used in conjunction with an optional air gap faucet. Specifications:Fittings Size: 1/4" Push-inBolt Length: 1-3/8"Includes: Two (2) boltsConstructed of: 85-5-5-5 naval bronzeDesigned to fit standard 1-1/4 in. to 1-1/2 in. Dia pipes