PVC Self Adhesive Cable Cover (25 x 16 mm, White)

I have ordered this size I think that the small which I wanted but unfortunately it’s big but it’s fine I can handle, strong quality

Tried straightening it, the glue black stuff on the back was separated and stuck to the white wall.. now I have a black line and a useless plastic

I have received the 16mmx25mm made from soft plastic material. It’s low quality by all means

The trunking itself is of decent quality. My gripe is with the sticky tape on the back. It's black and will permanently stick down. This means if, you try to correct it once applied, the tape will separate, leaving residue on both the application and surface and the trunking. I removed the black tape and applied my own in the end.

Not sticking

Comes with a peel off sticker at the back to fix it on a wall or floor. the top part slides off easily so you can put the wire and place it back.

Received quickly, took 5 min to install (had to cut it to adjust). The adhesive tape is white, not black as mentioned in some comments.

I ordered 6 pieces, all ship individually and 3 of them were crushed and bent. Replacements showed up also crushed and bent. If they survived shipping, I'd order more but alas I won't bother trying again.