1 Pallet = 102 of Pre-clipped 1m x 1.2m Panel. Each panel unclips into 500mm x 600mm pieces. The 20mm Nero Drainage cell system has a unique Diamond CUP structure which provides water retention for passive irrigation and helps building a perch water table in the above soil profile for the vegetation to flourish in prolonged dry periods. 20mm Nero Drainage Cells is made from recycled Polypropylene and is inert to soil borne chemicals and bacteria. Nero cells shallow and effective drainage profile helps landscapers to make use of mature plants on roof garden which needs soil depth and water retention properties. System Benefits: - Very high compressive load carrying capacity of up to ＞155 tons​​​/​​​m2. - Maintains actual void size for effective drainage after backfill & compaction. - Fit-in system easy to cut and comes in pre-clipped panels.