Description:
LifeStages ACE Double Door crate:
http://www.midwesthomes4pets.com/products/lifestages-ace-double-door-crate

Here is the one for the LifeStages Exercise Pen with Split MAXLock Door:
http://www.midwesthomes4pets.com/products/lifestages-exercise-pen-with-split-door

Playlist: How to teach the basics- http://www.youtube.com/playlist?list=PLMssKIjsDxXmMGypWsr8u-yGOUSoPoozb