The Flopro Mechanical Timer is made from premium-grade plastic with a manual override for added convenience. Enables automatic watering of your garden. Ideal for adding to irrigation systems or for use with sprinklers to water your lawn. You can pre-set up to 120 minutes in 15-minute increments. The connectors allow a snap-fit to all watering brands. No batteries are required. Specification: Hose Diameter: 25mm (1in) with 19mm (3/4in) and 12.5mm (1/2in) inserts.