4B's Big J elevator buckets have a scientifically-designed profile with a correctly angled front lip for maximum pickup and clean discharge of material over a wide range of operating speeds. The design also reduces back legging by making the brake lines of old-fashioned CC-style buckets obsolete. 4B's Big J buckets have the greatest actual measured capacity - meeting or exceeding the water level and usable capacity of all other brands. They are made of the toughest commercial grade high-density polyethylene, urethene or toughened nylon, built for maximum impact and abrasion resistance, as well as bolt-holding strength. Big J’s standard operating temperature range is between -60° to 225°F (polyethylene). The buckets have standard bolt holes and are fully compatible with other brands. Special holes or venting available.