I have a 100 litre tank for LPG
I cannot remember the exact dimensions - however it is a perfect fit behind the back seats in a saloon. I know - because I've measured it up in mine.
It comes with the valves, airtight valve box, and electrical soleniod. It also has a frame with straps included.
It's 5 years old - meaning you have another 5 years to get it certified.
There is 40 litres of gas in the tank.
I'm after £100 for the lot - a saving of about £180 compared to buying it new.
I may be able to deliver for the cost of fuel, depending on where you are.
Would be a gem for someone looking for a budget LPG conversion on a Mig