Regular: Built for large computers – including the Garmin Edge 1050, WAHOO™ Roam. Design to fit 31.8mm round handlebars. The Max XL is the latest and strongest version of the out-front K-EDGE mount. We’ve refined this mount with a solid one piece arm and thin upper clamp. Combo: Built for large computers, cameras, and lights – including the Garmin Edge 1050, WAHOO™ Roam. The Max XL Combo shares the strength and design features of the regular Max XL with the added benefit of a GoPro-style interface, allowing you to securely mount your light or camera underneath. Specifications CNC Machined Aluminum Combo (computer on top – light or camera underneath) Anodized Black with laser-etched logos Made in-house, Boise, Idaho USA Lifetime Guarantee against material or manufacture defects - damage due to abuse or crashing excluded Weight Regular: Hammerhead 50 g, Wahoo 50 g, Garmin 50 gWeight Combo: Hammerhead 64 g, Wahoo 63 g, Garmin 63 gDimensions: 11 × 20 × 4 cmClamp Size: 31.8 Compatibility Hammerhead Karoo 2 Cycling Computer All Garmin Cycling Computers (including Garmin 1050 only with stem faceplates less than 4.5mm thick). If additional clearance is needed for your specific handlebar - Offset Spacer for Garmin EDGE 1050 sold separately. Most Wahoo cycling computers. (Not compatible with Wahoo Ace) Combo (GoPro style light/camera interface) adapter compatible (K13-580-BLK included) Payload Capacity- Top - 161g (example: Garmin EDGE 1050) / Bottom 242g (example: NiteRider 1800 or Cycliq FLY12 light/camera) SKU: K13-4505-31.8-BLK (Garmin Regular)SKU: K13-4505C-31.8-BLK (Garmin Combo)SKU: K13-4505W-31.8-BLK (Wahoo Regular)SKU: K13-4505WC-31.8-BLK (Wahoo Combo)