The extra match-strikers for MATCHCAP waterproof match case. The Refill Kit includes safety match strikers (rectangle pad on the inside) as well as strike-anywhere match strikers (round sandpaper pad on bottom) and an extra o-ring.
These are pressure-sensitive adhesive pads that have abrasive on one side and only strike-anywhere matches will light on these. To replace, peel off the old pad and then peel the back off the new pad and apply to the MATCHCAP.
The red phosphorus striker is what is usually found on the side of matchboxes. Just as the matches themselves, it must not get wet. Replacement is similar to above mentioned - peel off the old pad and remove any adhesive residue. Then,peel the back off the new pad and apply to the MATCHCAP