*PLUMBERSSTOCK EXPERT* responded:
Hi! According to its specification sheet, this Shoemaker 151 4-way louvered ceiling diffuser grille comes with stiffened 1/2-inch blades, so the answer is "No". One good thing about having stiffened steady blades is that it gives a quiet operation, providing you a more rest-conducive environment. But if you're flexible with the series, we have the Shoemaker MA 16" x 16" modular core diffuser that has adjustable blades. If you want to give it a try, simply add it to your cart to start placing an order. Thank you for letting PlumbersStock.com help you in finding answers to your plumbing questions.