Flash shall hnvs a siherica1 bor:o-,, with a nain and auxiliary neck of equal Liarietir. Azd a side Cube Joinin3 the aLxi?iaKy neck 77 m bdov Che cop ani. Inclhzd dovnvd;d ac an. Asle of 75 dsprees vith the vertical axis. Both necks shall have reinforced rins.