The drum has a slightly smaller size and diagonial grid pattern to make it easier to roast small bean coffees and blends with small beans. It also has a hingeless clasp. The smaller grid does mean that there will be more chaff caught in the drum with the roasted beans. Chaff is essentially flavor-neutral, so it is not a problem to grind a little chaff with your coffee - or you just can blow the chaff off.
Length: 10 3/8" (Drum)
Length: 11 1/2" (Including stud on either end)