The Sequence Hook Stems come in (2) sizes with a 26mm & 33mm reach. The 26mm Hook Stem weighs 202 grams and the 33mm Hook Stem weighs 241 grams. This product is a Sequence original that came about with a collaboration from Aaron Frost and Brandon Fenton back in 2004. Still the markets lightest most reliable flatland stems to this day. All Sequence products are designed by flatland riders for flatland riders! This product requires a minimum steer tube length of 44.45mm to ensure proper function.