Fits for 1/4 – 2″ Model 950XL, 975XL, 950XLT2 and 975XL2 backflow prevention assemblies. This set of three tools provides a seat removal tool for 1/4″ – 1/2″ (971-SEATTOOL), 3/4″ – 1″ (972-SEATTOOL), and 1-1/4″ – 2″ (973-SEATTOOL) 900XL series of backflow assemblies.