Vials ship in 1-3 business days.
Note:
Microspheres of 10-27um diameter come as 500mg samples
Microspheres of 27-45, & 45-53, micron diameter come as 5g samples
710-850um, & 850-1000um particles are >75% spherical.
Particles of smaller sizes (<~100um) show a weak fluorescent responses, with 10-27um being the weakest.
Larger Particles have a slightly better response.