BPI Stainless Steel Solar Color 4L is made of 100% low maintenance stainless steel. The chassis is lined with high value insulation with excellent heat retention properties. BPI Stainless Steel Solar Color 4L is UL listed (USA Underwriters Laboratory Certification) and meets or exceeds the European CE and Canadian CUL standards. It holds 4 quart tanks or up to 8 mini tanks and is designed for high volume gradient production with the (optional) Solar Color 4L Gradient Lensor. The instrument also has a built-in receptacle for an optional gradient and has a 5 year limited warranty. Set-up Kit: BPI Lens Prep II. BPI Neutralizer II. BPI GL77 Heat Transfer Fluid. BPI Lens Holder II. 6-pack of BPI Molecular Catalytic Tints (Gray, green, blue, yellow, brown, pink). Manual. Tanks and lids. Adapter Plate. Precision thermometer. Wall outlet (UL systems). HTF siphon pump.