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Vanlgs via Amazon [amazon.com] has Vlangs Twister Arm Trainer 5-Level Adjustable w/ LED Display & 27° Ergonomic Grip (40-130-lb) on sale for $36.99 – 50% off when you apply promo code QYHFLF9G at checkout = $18.49. Shipping is free w/ Prime or on orders $35+.

Note: Amazon promo codes don’t always apply seamlessly. If you run into this issue, try refreshing the page, re-entering the code, or checking after you select a payment method to confirm whether it already applied.