Umbrella mounting hardware. I think it can be attached to strollers, silver carts, and bicycles. Pipe diameter: Can be attached if it is 18-30mm. Length: 38cm I think it has a considerable range of movement. The construction is sturdy, so it's durable. I ended up not using it. I plan to ship it without the box, with simple packaging. I have stored it in a dark place, but please understand that it is stored by an amateur. Color...Brown系 (Brown-ish) Stains, tears, odors, etc...Yes Stains, tears, odors, etc...None Color...Blue系 (Blue-ish) Pattern...Solid