jelostone 6''w x 1/4''h x 48''l - commercial aluminum door threshold(mill aluminum)- door saddle- ada accessible barrier free- fire rated- door thresholds for exterior doors - b304a 6''w x 1/4''h x 48''l mill aluminum is up for auction in Tools & Home Improvement. The current bid is $1.00, 98% below the $62.98 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.