Smoke free, pet free home. The only unavailable weight increments are 12.5 lbs, 22.5 lbs, 32.5 lbs, 42.5 lbs, 52.5 lbs, 62.5 lbs, 72.5 lbs and 82.5 lbs. Powerblock 501-00097-01 50-70lbs Elite Stage 2 Set . All rights reserved. 19 watching. The U-50/90 stand Comes with PowerBlock Urethane logo decal. Shop products from small business brands sold in Amazons store. The PowerBlock Urethane Series dumbbells are reportedly made using a urethane coating on the weight plates. NOTE: There used to be the "Urethane Series" of PowerBlock dumbbells, which were discontinued in 2018 and replaced by the Pro Series. The set itself has been discontinued for a number of years and we have been fortunate to still be able to support the expansions up until recently. I have a set of Powerblock U90 adjustable dumbbells with the Stage 2 expansion (for 50-70lbs). Selecting new vs used Powerblock dumbbells.