These high quality tanks and reels will last for years with virtually no upkeep. All tanks come with light-tight, easy-fill plastic lids and caps. The 7 and 12 tanks come with metal lift rods. The 35mm tank holds 1 - 35mm reel. The 120 Tank holds 1 -120/220 reel or 2 - 35mm reels. The 7 tank holds 2 - 120/220 reels or 4 - 35mm reels. The 12 tank holds 4 - 120/220 reels or 8 - 35mm reels.