Surprisingly difficult to track down these days - it took me ages to get my hands on a decent example of this model! It wasn't around very long - it was released in 2004 when it replaced the ST4551D (same shell, chrome lugs and die-cast hoops) and was itself replaced in 2007 with a model without the tone control rings – the BPST4551A. As a result, and also because I think people hold onto them as they are such a good "workhorse" snare, this model and it's deeper brother are really tough to find these days.