Overview The A3 risers are designed specifically for the Wing 20C+ (I or II version bars), and Wing Ultimate S basebar. The system is backwards compatible with A2 risers by using the A2/A3 adapter. Key Features: Compatible with the A3 riser system Can be used with A2 riser system with adaptor Tech Specs Compatibility: Wing 20C+(I or II versions) and Wing Ultimate S Includes: Risers and Bolts specific to the kit size Weight: 35mm: 594g and 80mm: 726g (Complete Kit) Tech Guide A3A High Riser w/A3 BTA Bridge Kit Includes: Risers: 5mm: 2 Risers 10mm: 2 Risers 20mm: 2 Risers 40mm: 2 Risers Bolts: 75mm: 4 Bolts 80mm: 4 Bolts 85mm: 4 Bolts 90mm: 4 Bolts 95mm: 4 Bolts 100mm: 4 Bolts Accessories: Washer: 4 Washers A3 BTA Bridge (5mm): 1 Bridge Manual A3 Riser Installation Instructions A2 Bracket with A2A Bridge Bolt Chart Installation Instructions A3 Bracket with A3A BTA Bolt Chart Installation Instructions