Bulls Sideloader Stems – Bulls Wing Shafts Short in Medium. Will fit most standard flights and holds the flight in place perfectly. This unique style of stem is made of a very strong rubber like material and is designed to be extra durable. Comes in Medium and Short.Bulls Sideloader Stems – Bulls Wing Shafts Short in Black. Will fit most standard flights and holds the flight in place perfectly. This unique style of stem is made of a very strong rubber like material and is designed to be extra durable. Comes in Medium and Short.