Powerjet Fountain Head 3 Step, Medium Is Suitable For:  - Laguna Powerjet 400 Fountain/waterfall Pump Kit (pt324) - Laguna Powerjet 600 Fountain/waterfall Pump (pt326)  - Laguna Powerjet 900 Fountain/waterfall Pump Kit (pt328)  - Laguna Powerjet 1300 Foun