GUB 3M back buckle for phone used

GUB 3M back buckle for phone used

Composite engineering materials+3M VHB Strong sticker, 
50*35*2.8mm,

N.W.:  7g, G.W.: 10g,
2 spec: Garmin/Bryton optional,
Fit for paste on back of phone/phone case to use on Garmin/Bryton computer,
Included 1*back buckle+1*silicone strap