Len Gordon 950415 Air Button, Len Gordon #4 Lite Touch, Gunite, Black#4 Lite Touch™ Gunite Fits inside 1" pvc pipe Service Note: Control Distances The air button should match the type of air sensor in use. A low volume button may not activate a latching air sensor. Likewise, a high volume button may damage a momentary air sensor Button #4 #10 #15 Latching Do not use 15 ft 15 ft Momentary 75 ft 150 ft 150 ft