Bar fly 4 stem cap mountthe 4 stem cap mount from bar fly effectively and conveniently converts your standard 1 1 8 stem cap into a durable and versatile gopro style mount.cycle computer mount for your existing 1 1 8 stemthe bar fly 4 stem cap mount replaces your existing 1 1 8″ stem cap. You can mount one of 7 included computer heads, or gopro base to the stem cap mount. Please note may not work with large computers and hi rise stems, check clearance before ordering. The center of your computer will sit in the centre of the stem cap. Compatibility garmin edge series 200, 500, 510, 520, 800, 810, 820, 1000, 1030, touring watches 910xt, 920xt polar m450, m460, v650 wahoo elemnt and bolt mio 500, 505, 505hc cyclo 200, 205hc, 210, 315hc, 400, 405, 405hc, 505hc, 605hc magellan 315, 505 powertap joule cateye wireless models padrone, strada, micro, velo bryton 100, 300, 310, 330, 530, 10, one, 410 lezyne micro, micro c, mini, macro, super and superse lezyne computer head is sold separatelyin the box bf4 aluminium stem cap with stem bolt and hardware bf4 4mm spacer, to raise mount if needed 7 computer heads garmin, polar, wahoo, mio, joule, cateye, bryton gopro base note light mount is not included with stem cap mountbuy bar fly accessories from chain reaction cycles, the world's largest online bike store.