One-hand, EZ close shut-off of individual baskets - prevents water and fertilizer spillage and waste. Snag-free slim design for easy retrieval from plants at harvest - no more lost weights. 94% flow uniformity from the first basket to the last in any system. Each pre-assembled SlimLine EZ Close™ Weight assemblies include: .5gph WPCJ Dripper with built-in check valve, Super Flex UV White™ PE tubing and weight.