instruments do not generally suffer from the same intonation problems as horns with a cylindrical extension. In the 1970s, Yamaha's YBS-61 was keyed to low A with no low B option, and by the 1980s most baritones were being manufactured with a low A bell. In modern times, only a few manufacturers still produce low B instruments, as the low A is considered standard and is often written in sheet music for the instrument. In its original form, the baritone saxophone's highest keyed note was high E, but instruments keyed to high F became standard during the 1920s. High F became a rare option starting in the 1950s and slowly became more common, but as with other modern saxophones, most baritones are now manufactured with a high F key. Description The baritone saxophone, like other saxophones, is a conical tube of thin brass. It has a wider end, flared to form a bell, and a smaller end connected to a mouthpiece. The baritone saxophone uses a single reed mouthpiece like that of a clarinet. There is a loop in the top of the body (sometimes also known as the 'pigtail') in two U-shaped pieces of tube called the upper bow and spit bow, to reduce it to a practical height. Baritone saxophones are typically found in two versions with one ranging to low A and the other to low B. Despite the ubiquity of the low A horn, some players still prefer to use B horns because of the added weight of a low A bell or because of personal preference for a particular vintage instrument. Some also believe low A horns sound inferior in the low range, however this is the subject of debate among players. The baritone saxophone's relatively large mass (, depending on the manufacturer's choice of material and structural designs, and whether it has a low A key) has led to the development of harness-style alternatives to neckstraps which distribute the instrument's weight across the user's shoulders. Several different kinds exist which each distribute weight differently across the saxophonist's neck, clavicle, and shoulder blades. Many marching saxophonists prefer this style for its ability to decrease fatigue. Those who mainly perform seated, on the other hand, may dislike the decreased ability to move one's upper body with a harness. Some modern instruments are also produced with mounts for floor pegs to reduce weight on the player's neck