This long upper half of the strap is used on the earlier 5.5 gallon strap and goes around the circumference of the tank as opposed to the later 7.5 gallon tank where it goes across diagonally. The shorter strap is
2A2231[link/] and both are used on left or right hand tank fittings. The joining bolt for 2 straps is[link]GFK518747H9535M can be glued to the strap to stop the tanks moving