The Trolley is an accessory for the Jet Set Pet Carrier (sold separately). Jet Set Trolley The Trolley is an easy way to travel with your pet. Around town or in an airport this Trolley is easy and convenient. The Trolley makes it easy to strap and stack your Jet Set Pet Carrier, and the optional Grooming Bag, into one wheelable, easy to transport stack. All 3 items can alternatively be purchased in one package (see related items). Usually leaves our warehouse in 1 - 3 business days.