The bridgeless design of the Netafim SpinNet Micro-Sprinkler provides that drip-free operation you want in your greenhouse or nursery application. Uniform droplets and distribution means better germination. SpinNet sprinklers are low maintenance, durable, and highly resistant to chemicals and acids often used in greenhouse and nursery settings. The SpinNet micro-sprinkler comes standard with a check valve assembly to prevent drainage after system shutdown.