Industry Nine A318 Stem - 50mm 31.8mm Clamp +/-4.4 1 1/8" Aluminum Purple Polyester & Elastan 170gr Dual Head fits both Presta

Dual Head fits both Presta and Schrader valves

Other features include YKK® zippers

✔ Customizable Hydration – Compatible with a hard bottle

Ceramic bearings

Industry Nine A318 Stem - 50mm 31.8mm Clamp +/-4.4 1 1/8" Aluminum Purple Polyester & Elastan 170gr Dual Head fits both PrestaIndustry Nine A318 Stem 50mm 31. 8mm Clamp + 4. 4 1 1 8" Aluminum Purple. Industry Nines A Series mountain bike stems are crafted from domestically sourced 7075 aluminum billet into a svelte design achieving a nexus of form and function. Using advanced manufacturing techniques honed over decades in our CNC machine shop we continue our proud tradition of offering riders uncompromising components. The A35 and A318 utilize either a 35mm or 31. 8mm