Size(L*W*H) 25x50x75mm, Hardness HRC 57-62, Material Hardened steel, Brand Machifit, Quantity 2pcs, Hole 23 /00€, Precision ±0.005mm.
Basically copy coupon, view price history or create e-mail price alert. Best price?
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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($27.59): BGMACHI06
2. ($29.32): BG5c6e66
3. ($31.04): BGGines
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BGad34c8, BGca04ad, BGdbd151, BGherra, Tabby20, BGe3b69f, BGTDL01, BGHID18, BGTACC18
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Machifit 2pcs 25x50x75mm 23 Holes Parallel Clamping Block [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Machifit 2pcs 25x50x75mm 23 Holes Parallel Clamping Block. The lowest price was: $18.99.
Price records source(s): Banggood
Click on image to enlarge. 
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)).
. I don’t really know if this price is reasonable, coz there’s no price history in my DB.