Delta X-Mount Bar Pro Stem Mounted Phone HolderThe Delta X-Mount Bar Pro Stem Mounted Phone Holder securely holds any phone with any case and offers a minimalist profile. The proprietary stretch materials grip your phone on all 4 corners. Alloy construction and silicon stretch web material securely holds your phone. Updated models include mounting suited for your Garmin and Wahoo systems. Installs under stem cap. Weighs only 0.11lbs or 50 grams.