Tideline RO/DI Systems are made here in the USA ! Tideline RO/DI Systems are designed to suit the needs of beginner, intermediate and advanced aquarium hobbyists. With a water production rate of 100GPD (gallon per day), the Tideline RO/DI systems can produce enough water for even the largest of home aquarium systems. Features - Hand made in the USA - Quick Connect Fittings - Heavy Duty Mounting Bracket - Garden Hose Adapter Included - Filter Wrench for Easy Filter Changes - 6-ft Each of Supply/Drain/Product Tube - One-Year Limited Warranty Specifications 6-Stage Advanced - 1 micron sediment filter - 2 x high-capacity carbon block filters w/ 4X longer life - 100GPD TFC Membrane - 2 x Nuclear Grade, Color Indicating, Virgin DI Cartridges - Pressure Gauge for monitoring pre-filter performance - TDS Meter for monitoring system performance - Flush Kit to Extend TFC Membrane Life 4-Stage Standard - 1 micron sediment filter - High-capacity carbon block filter w/ 4X longer life - 100GPD TFC Membrane - Nuclear Grade, Color Indicating, Virgin DI Cartridge - Pressure Gauge for monitoring pre-filter performance - TDS Meter for monitoring system performance - Flush Kit to Extend TFC Membrane Life 4-Stage Economy - 1 micron sediment filter - 2 micron carbon block filter - 100GPD TFC Membrane - Nuclear Grade, Color Indicating, Virgin DI Cartridge