Aluminum Pulley Brass Frame is an SSI India product in the Mechanics category. Key specifications include SKU: SSI-PHY-MECH-11. SSI-PHY-MECH-11.1 Double Tandem (Long)-one pulley each of diameter 50 and 38mm mounted in line in aluminum frame. SSI-PHY-MECH-11.2 Triple Tandem (Long)-one pulley each of diameter 50, 38 and 25mm mounted in line