Blue Vinyl Round Stretchable Pipe End Cap 2-3/8" (2.375") ID x 1" deep PVC (10 Pack) - - Amazon.com
MECCANIXITY PVC Rigid Round Pipe 36mm ID 40mm OD 500mm White High Impact for Water Pipe, Crafts, Decoration, Cable Sleeve: Amazon.com: Industrial & Scientific
Amazon.com : uxcell G1-1/2 Pipe Fitting Cap, PVC Round Female Thread Hose Connector, for Garden and Outdoor Water Pipes End, Gray 6Pcs : Patio, Lawn & Garden