https://www.yfoutdoorumbrella.com/product/courtyard-outdoor-umbrella/6bone-swing-hand-double-top-umbrella.html
Material: 180g polyester fabric, waterproof treatment, open skylight
Umbrella Bone: 6 strands, 12*18mm. iron oval
Umbrella pole: ø38mm, iron
Base: None
Features: with rocker, no steering, with pins