sliimu patio umbrella clamp, suitable for railings, fence posts, bleachers,benches | heavy duty deck railing umbrella holder, balcony railings mount attaches?deck umbrella holder?bleacher umbrella clamp is up for auction in Patio, Lawn & Garden. The current bid is $2.00, 93% below the $27.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.