ridge products the duke single 1.0 | shade 10 red auto darkening welding lens | 2" x 4 1/4" x 0.2" | darkens automatically and ultra clear | red front - green weld view | ridge products royal series shade 10 the duke single 1.0 - red is up for auction in Automotive. The current bid is $1.00, 98% below the $49.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.