The 30 Gallon Stainless Steel Reservoir from Buyers Products is made of high-quality 304 stainless steel with welded-on carbon steel mounting brackets. Its sleek, polished appearance will stand up to salt and weather for long lasting use. Great for winter road applications, this reservoir comes fully tested. The reservoir has several features for optimal fluid operation, including: - a quarter-turn chrome filler breather with a wire basket strainer - a sight fluid level and temperature gauge - an interior baffle between suction and discharge to aid in fluid cooling - a magnetic drain plug to aid in preventing metallic particle contamination The reservoir comes pre-drilled for a tank-mounted HFA5S series return filter (sold separately).