Heat sealer (Slack Lane DE22)
Might be this one.. https://www.amazon.co.uk/dp/B0D8TDQWSG?ref=cm_sw_r_apan_dp_9T61NCXSX0DDK1F467NJ&ref_=cm_sw_r_apan_dp_9T61NCXSX0DDK1F467NJ&social_share=cm_sw_r_apan_dp_9T61NCXSX0DDK1F467NJ&starsLeft=1&skipTwisterOG=1 definitely similar. Bit dusty but still works.
