Not an authority, believe compressor output, CFM, will dictate size nozzle and thus determine media size. I am limited to nozzle size because have a small shop compressor rated approx. 6.5 CFM @ 90psi. When I purchased the sandblaster also purchased some of seller's blasting media later found was too large, nozzle kept clogging up. Once I went to smaller media equipment worked great.

dave