The black RAIN lid fits onto both the 15ltr and 30ltr silver rain pots. Made in the UK, this durable plastic lid features rows of holes that enable the nutrient solutions to cover the entire area of the pot and therefore reach all areas of the root zone equally. RAIN black lids are designed to fully drain using specially placed holes and also allow for air to flow throughout the pot. The RAIN lid can be used with the RAIN lid cover, sold separately.