All the necessary components are included to efficiently water up to 15 containers in one simple kit. The Micro Drippers have a simple ‘Push Fit’ design to ensure easy installation. A flexible 4mm hose carries water from your tap to individual Micro Drippers positioned in pots around your garden or patio area. The kit allows you to add any controller you wish, allowing you to automatically water your garden at a time that is convenient to you. Contents: 1x Pressure Reducer, 15m x 4mm Micro Hose, 15x Micro Drippers & 14x 4mm T Pieces.