Add height to the emitter for overhead irrigation with the 12 in. Riser. The riser accommodates a jet, micro sprinkler, or micro sprayer with 10-32 threaded inlet. The riser has a 1/4 in. barbed inlet at the bottom to insert into a hole in supply tubing. Use the 12 in. long riser with along with a stake for support. The riser is made of polyethylene treated with UV inhibitors.