Agility Gear 1" Molded Jump Cups - 20 Pack This is a package of 20 Molded Jump Cups They clip onto 1" Internal Diameter ( or approx 1.3" External Diameter ) PVC in seconds The Cups are molded without sharp edges for safety and meet all AKC Specifications They allow the jump bar to be set at multiple heights by sliding the cups up or down the uprights