Sand is an essentiel enrichment for your hamster. It is recommanded to let it all the times so he can groom and roll in it for a shiny coat.
Somes us it as a toilet, the shovel is useful in this situation. Remove debris daily and change it until the sand is too humid.
 
Kit includ: one bath sand, one sand bag (1,5 kg) and one mini shovel.
 
Baths dimensions 
Round: 6L x 6W x 3,5H in
Square: 6L x 6W x 4H in
Triangle: 8L x 6L x 3,5H in