Kannastor 4pc Black Multi Chamber Grinder w/ Jar Overview. These 4 Piece Jar Body Grinders have been a Kannastor favorite for over a decade! Equipped with a replaceable screen and a Limited Lifetime Warranty, these wholesale grinders are designed to last! Features & Specs. 4 Piece aluminum construction Jar body design Included a 60 mesh and 100 monofilament Easy Change Screen Prevents overshredding Matte black finish Limited lifetime warranty Available in 2.2" or 2.5" What's in the Box. 1x - Kannastor 4 Piece Multi Chamber Grinder with Jar - Black