KEE KLAMP Swivel Flange Galvanized Iron Pipe Fittings - Fits 1" Schedule 40 PipeEasy to install and maintain.Pipe sizes listed in charts are for Schedule 40 pipeTo use with pipes other than Schedule 40, find pipe outer diameter and choose pipe fitting for corresponding Schedule 40 pipe (i.e. -3/4" Schedule 40 pipe corresponds to 1.05" pipe outer dia.), Lot of 1