Its, a steel billett crank, the rods are lightweight type and in this instance are 138mm long and weigh 531 grams the pisons are 88mm and weigh with the pin 276 grams. I use many combinations of rods ,pistons and cranks and can supply them all to almost any spec. the price of the crank is £2300, I will post the price of the rods and pistons shortly.