BBB Jumper Stem 0D 31.8 45mm Black 6061 T6 Alloy FREE shipping within Australia over $100.00 Click and collect or buy online Share Loading Facebook Like button... BBB Jumper Stem 0D 31.8 45mm Black 6061 T6 Alloy FREE shipping within Australia over $100.00 Click and collect or buy online Share Loading Facebook Like button...