I have used elecjet products with my Macs and they provide good 'magsafe' adaptation for USB power. Delivery and tracking are very poor - 3 weeks plus so don't order if you need them quickly.
It works successfully with MacBook Pro 15" (87W). But with a USB-C connector weak contact.
Great product with stable connection while charging my MacBook. Recommend it!
Took a bit too long before being delivered