Eisco Labs Steel Burette Double Clamp - 7" separation， Max 20mm Dia. Rod</br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41JdPhRwJDL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31cf6hKqQAL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41PY7Y-M0%2BL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/412rrcWAsPL.jpg' noproxy></br>