Not a lot we can really tell you about this, it's rosin/resin to apply to your bow.

It's approx 31.0(W)x49.0(H)x15.0(D)mm and weighs approx 15g.

As can be seen from the second picture, some of these have cracks in them, this does not affect the rosin in the slightest, it is not cracked all the way through and as the rosin is used will not form sharp edges.

PLEASE NOTE: PACKAGING MAY DIFFER FROM THAT SHOWN IN THE PICTURE.