3/4" Plastic Dowel End Cap, Black - Craftparts.com
Wood Finials, 3/4 Inch Tall with 1/4 Inch Hole, Unfinished Wood Finials for 1/4 Inch Dowel Rods, Wood Dowel Caps for Crafts and DIY, Pack of 100 by Woodpeckers - Walmart.com
1-1/4in Dowel Bar Cap | Dowel Bar Cap & Chairs
Wooden Banner Dowels | Atlas Dowel and Wood Product Company