The OTC Air Assisted Bottle Jack is available in three versions: 12-ton (No. BT12P), 20-ton (No. BT20P), and 30-ton (No. BT30P). Each jack meets ASME PASE safety standards and is made of a forged base and cylinder with a chromed pump piston and ram. The jack can be operated manually or with shop air; the air-assist feature quickly raises the lifting arm with fewer pumps needed. Each jack also includes a built-in safety valve to prevent overloading and a stable base to prevent tipping if loaded off-center.