4" ID x 4.584" H with 2" detachable collar. Mold volume of 1/30 cu. ft., cold-rolled steel tubing, plated for rust resistance. Includes detachable base plate, studs and wing nuts. ASTM D558, D698, D1557AASHTO T99, T134, T180. Shipping wt. 16 lbs. (7.3kg)