Description Overview Two Spuhl Anderson crate openers available Item A is model BK-4 Item B is model BK-5 Specifications For Item A (Model BK-4) Maximum capacity: 12,000 lbs Maximum coil count: 550 Maximum wire gauge: 12 Voltage: 220 V Phase: 3 Current: 2.1 amp max Works with chain Specifications For Item B (Model BK-5) Maximum capacity: 18,000 lbs Voltage: 240 V Phase: 3 Current: 2.1 amp max Works with chain