Kit includes one heavy-duty diaphragm spring and set of carbide ball bearings Harder and heavier ball bearings lift spring quicker and actuate faster to create more pressure at an advanced rate Pressure plates with 32-bearing pockets should use the 3/8" ball bearings Pressure plates with 42-bearing pockets should use the 5/16" ball bearings Instructions included Incluidos 16 rodamientos de bolas de 3/8" en carburo. Marca : BELT DRIVES LTD.Referencia del fabricante : HHP-1Nombre de producto : Resorte de diafragmaTipo : Rodamiento de bolasUnidades : Kit