Scrap the nose pore strip first 
yes I know it's really satisfying but it doesn't work. Those things in your nose are most likely not blackheads anymore, assuming you aren't a teenager. They are sebaceous filaments - little filaments that your pores grow faster than you can pull them out. The top bits oxidize and turn dark so they look like blackheads.
What you can do successfully is dissolve the dark gunk out with salicylic acid which dissolves in the oil and cleans them out.
Way, way better than a pore strip or facemask - my nose is free of black pores for the first time in 25 years 