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The JS SP50 is exactly what you need for your subwoofer/satellite speaker PA system. It’s adjustable in height from 31.5″ to 52.5″ and mounts between a subwoofer cabinet with a top mounting hole and a speaker with a bottom mounting hole (1.375″ for both). The JS SP50 features both a friction locking knob and a security pin system and is made from durable steel. Heavy duty construction Height adjustable from 31.5″ to 52.5″Friction locking knob with security pin1 3/8″ upper and lower tubes. Height: 31.5″ 52.5″ (800mm 1334mm)Upper Tube Size: 1.375″ (35mm)Lower Tube Size: 1.375″ (35mm)Weight Rating: 110 pounds. (50 kg)Weight: 3 pounds. (1.4 kg).jssp50.Heavy-duty construction
Height adjustable from 31.5″ to 52.5″
Friction locking knob with security pin
1 3/8″ upper and lower tubes
Steel construction