- CNC Machined Aluminum - Combo Compatible (K13-580 adapter sold separately) - GARMIN approved replaceable computer insert protects computer tabs - Anodized Black with laser etched logos - Payload Capacity: Top 123g / Bottom 242g with combo adapter - Weight- 50g Compatibility: - All Garmin Cycling Computers - Combo (GoPro-style light/camera interface) adapter compatible (K13-580-BLK sold separately)