Bowflex SelectTech 552 Dumbbells w/Stand – Costco Sale! by Rhonda March 17, 2022 March 17, 2022 *UPDATE* 3/17/22. The Bowflex SelectTech 552 Dumbbells from Costco includes a set of weights with easy-to-use selection dials that adjust from 5 to 52.5 lbs in 2.5 lb increments (up… 0 FacebookTwitterPinterestEmail