Product Description Made from American aerospace aluminum , the Paul Component Engineering Boxcar stem offers an optimized balance of torsional stiffness, strength and light weight. Paul Component Engineering Boxcar Stem Black 31.8 Mm X 50 Mm X +/-0 Degree at REI.com Browse all REI.com deals $147.50 In Stock at REI.com Price verified today Buy Now at REI.com Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Paul Component Engineering Color Black Size 31.8 MM X 70 MM X +/-15 Degree MPN SM8992 Paul Component Engineering