Features: - Gator GFW-ID-SPKR-SP - Speaker spacing bar with thread - For 1 3/8 "and M20 subwoofer mast brackets with thread - Easy to grip tension knob height adjustment - Height adjustable from 889 to 1524 mm - With removable adapter for M20 thread - Load capacity: 56.7 kg - Integrated safety pin - Material: steel - Weight: 1.8 kg - Colour: Black