Seamless construction. The dimensions of the 315 gallon tanks allow it to fit through a conventional doorway. (tank has 30" width - measure door opening before ordering). Tanks come complete with 16" vented manway and a galvanized steel support frame. 30"W x 50"H x 62"L size Excellent impact resistance. 140 lbs. Use with bulk chemical or without! You can clean up your backroom by installing these tanks, and then pumping your drums into the bulk tank. This way, you 1. don't run out when your away 2. don't have to let employees handle chemical 3. can get rid of emptys, and don't have fulls sitting around! This all together makes for a better backroom. Triple coat colors and Tire gloss is best to leave with 30 or 55 gallon drums. Bulk storage works best for your high use products, Presoak, Body soap, and Drying Agent.