Material Aluminum Alloy, Net Weight about 70g, Application fit for about Φ31.8mm/25.4mm/22.2mm (used attached spacer) handlebar, Brand ZTTO, Model Z-81, Compatibility Support for 55-100mm Width Devices.
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Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. This is new product in my database, so I don’t know if this price is good.
Link: Banggood product page
1. ($14.55): BGJUNEGSG9
2. ($15.03): BG00c906
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGKPBE3, BGSS10%SW, BGAFF10OFF, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, 13f142, BGHONEY2110, BG3d6795, BG88ecf7, BG3f910a, BGbikeholder, BG9a4d5b, BGbaa1d9, BGa33046, BG6b928c, BG0c2229, BG8ff374, BG0bd8d7, BG0e0923, BGc3ee5f, BG9dac31, BGAlerabat, 2022ACTIESNL, BGPHholder, TTSUMMER8, Cuponation9, 9OFFSUMMER, BG34b4f9
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – ZTTO Z-81 Aluminum Alloy Bike Phone Holder ($-3)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $6.99.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).