I have two new never used RV/Camper black or grey water holding tanks for sale. There is a blank photo separating the two tanks. They are of two different sizes The larger one has the dimensions shown on photo #2 .The smaller dimensions are 46in. long by 14in. wide and thickness is tapered from 3in. to 4 in. The 4in. being the drain end shown in photo # 5 after the blank photo. Note! each tank has the original prices shown in the photos. I want $100. each. These would be ideal tanks as a replacement or if you are building a camping trailer, schoolie,(bus) or even a pleasure boat. Vent and toilet inlet fittings can be thru ABS gluing or self sealing rubber grommets. Any RV Dealer or Amazon will have both.