Gray Rocky Mt. Thwarts Material: PVC C-7 Valves NRS Batton connection Thwart Reference #15 Circumference 40” Length 34” Thwart Reference #14 has a tapered bottom Circumference 40” Length top 34” Length bottom 32" Thwarts hold air and have been soaped down and tested. Thwarts are "as is" with...