This kit has everything you need and then some to assemble an amazing 20 gallon Ball Python enclosure. 
 
This kit includes:
2x  6qt BioActive Grasslands Substrate
2x  6qt BioActive Rainforest Substrate
1x Small Bag of Leaf Litter
1x Large Bag of Leaf Litter
1x  Small Cork Oak Flat
1x  Jungle Wood Piece
1x Medium Rock
1x Small Rock
1x Bag of Sphagnum Moss
1x Bags of Green Mountain Moss
1x Springtail Culture
1x Dwarf White Isopods 25+ 
1x 2-piece Ball Python Plant Pack
 
This Kit was designed to provide you with everything you would need to set up a 20 gallon Ball Python BioActive enclosure. All you need to provide in addition is the enclosure, misting system, lighting/heat, and the animal itself!