Very good and high-quality product and the guys from Muziker were as usual very professional. I put the Gotoh SG381 04 keys on a Sire H7 and they fit perfectly. The original keys seemed high-quality too but I always had the feeling that the guitar was always out of tune. With the Gotoh keys the guitar stays very well tuned and the tulip design is harder to detune if you accidentally touch the keys. So I recommend this type of keys which feel a bit like the ones on my other Gibson custom shop guitar.