Magma River Megapack - Unpainted
This huge set has a full assortment of the Magma River pieces, including a high number of Straight pieces for long runs. It contains every Magma River piece, except the two transition pieces to the older lava river style tiles (those two transitions are available as a stand-alone add-on pack - Lava River Transition Pack" - for those who need them).
These pieces work great with DF Light Panels.
Magma River Demo: