Two sets of flow restriction kits are included. Each set contains a 1/2 NPT restrictive valve and seven water flow restrictors with different flow specifications: 1.2/ 1.8/2/22/ 2.5/ 3.0 GPM. Shower and bath flow control. The kits are designed to reduce water flow to the selected rate while helping conserve water without significantly compromising daily use. Operating range. The restrictors operate safely at temperatures from 0 to 90 Celsius, making them suitable for most home shower or bathtub mixers. Small, precise restrictors. The flow restrictors are compact, measuring 14 x 16 x 5 mm, allowing easy integration into standard fittings. Compatibility and use. Designed for 1/2 NPT connections and compatible with most home shower mixers and bathtub mixers. Use scenarios - Family bathroom: swap in different restrictors to tailor flow to each user’s preference and reduce overall water consumption. - Rental properties or renovations: install to control water usage while maintaining comfortable shower performance. - Showers with variable water pressure: select a restrictor that provides a steadier, more predictable spray by balancing flow with pressure.