Plastic pulley mounted in tough unbreakable plastic frame having hooks ends for suspension and loading.
| SSI-PHY-MECH-3.1 | Single Pulley Block, with 25mm |
| SSI-PHY-MECH-3.2 | Single Pulley Block, with 50mm |
| SSI-PHY-MECH-3.3 | Single Pulley Block, with38mm |
| SSI-PHY-MECH-3.4 | Double Pulley Block, with Both Pulleys of 50mm diameter |
| SSI-PHY-MECH-3.5 | Double Pulley Block, with 38mm and 50mm |
| SSI-PHY-MECH-3.6 | Double Pulley Block, with 25mm and 38mm |
| SSI-PHY-MECH-3.7 | Triple Pulley Block, with all pulleys of 50mm |
| SSI-PHY-MECH-3.8 | Triple Pulley Block, with 25mm,38mm and 50mm |