- These panels are designed for use in rodeo arenas and systems - These panels are an ideal choice for heavy duty round pens, practice arenas, or pens - They are constructed using 13 Gauge - They have a 2 diameter round steel tube for the uprights and 14 gauge - These panels boast the same high strength properties as the 2W 400, 500, 600 series heavy duty panels - These panels do not require connecting posts and utilize a post pin connecting system