This Sonor Force 507 drum set has an 18" bass drum, 10" and 12" suspended toms and a 14" floor tom. The heads have all been upgraded, and the bass drum in particular has been yet further upgraded, with a Gibraltar riser (allowing the bass pedal to strike the centre of the head) and maple wood hoops, replacing the original steel ones. Both the riser and wood hoops vastly improve the resonance of the drum, and it is difficult to believe that it is only 18" in diameter. I have been using these drums for small group jazz gigs, as well as for a big band gig, where it absolutely cuts through! I'm very flexible about how I sell. For the four Sonor drums and mounting hardware on their own I am asking $350. If you need a snare drum as well, I have an excellent Premier Olympic steel shell model (shown in the pictures) which I can include for a further $100. If you also need hardware, I have available a snare stand, hi hat stand, chain drive bass pedal and straight and boom cymbal stand(s). Let me know what you need and I can quote package prices.