【Opened】Nitori Hemming Tape 2-piece Set

This is a set of 2 Nitori Hemming Tapes (Width 3.5cm x Length 300cm).

I purchased these to DIY adjust the curtains because the window height at my new place was lower than expected and the curtains didn't fit. However, it seemed too difficult for me, so I gave up on using them.

Both items have been opened.
For one of them, I've already disposed of the packaging paper. However, the other one still has its original packaging, so I will include it even though it has been opened.
Please note that the Precautions and How to Use are written on the back of the packaging paper.

The following is the product description from the Nitori official website.
Shipping will be via Yu-Packet Post mini.

Product Name: Hemming Tape (NT-3 3m)
Product Code: 7460399

------------------------------ Nitori Hemming Tape ------------------------------

Easily alter curtain sizes with just an iron!
Size (approx.): Width 3.5cm x Length 300cm

Estimated quantity needed (for our curtains)
?Curtains 100cm wide x 2 panels... 1 bag of this product
?Curtains 100cm wide x 2 panels (double pleats)... 2 bags of this product
?Curtains 150cm wide x 2 panels... 2 bags of this product

【Precautions】
?Adhesive resin may ooze out on coarse or thin fabrics.
?Some fabrics with glossy surfaces, coated fabrics, or other difficult-to-adhere fabrics may not be suitable.
?Be careful not to let the hemming tape come into direct contact with the iron.
?After ironing, do not move the fabric until it has cooled down to ensure proper adhesion.
?Cannot be used on fabrics with an ironing not allowed care label.
?Tumble drying is not possible. (The hemming tape may peel off and adhere to the drum.)
?If the hemming tape peels off after washing, it can be reattached by ironing.
?Cannot be adhered to acrylic materials.