ASTM D421,AASHTO T87
The heavy porcelain mortar and rubber tipped pestle is used to break down lumps of soil without damaging soil structure. Two sizes of porcelain mortar are available.
E-120 Mortar 100mm dia,300ml cap.
E-121 Mortar 130mm dia,500ml cap.
E-123 Rubber Tipped Wood Pestle 8" (203mm) long.