Overview Reviews Product Description Aluminum Forged Valve Stems for Street Anodized for corrosion protection Precision manufactured from lightweight aircraft aluminum 8.3MM, Black Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × BIKEMASTER Bikemaster Aluminum Forged Valve Stem 8.3MM, Black Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments