This kit has the basics you would need to assemble a 40-gallon Ball Python enclosure. 
 
This kit includes:
3x  6qt BioActive Grasslands Substrate
3x  6qt BioActive Rainforest Substrate
2x  Large bags of Leaf Litter
1x  Large Cork Oak Flat
1x  Jungle Wood Piece
1x Large Slate Rock
1x Bag of Sphagnum Moss
2x Bags of Green Mountain Moss
 
This Kit was designed to provide you with everything you would need to set up the basics or refresh a Ball Python BioActive enclosure.