Penn-Plax Here & There - Home & TravelerThe Penn-Plax Here & There - Home & Traveler provides an ideal environment for hamsters and gerbils. A convenient mobile traveler makes it easy to take your critters with you, while keeping them safe and secure.The Penn-Plax Here & There - Home & Traveler is available in small and large sizes. Size Dimensions Small 15 x 10 x 18 inch Large 15.5 x 24 x 9 inch