TRI ASSOCIATES SP-22 TRI ASSOCIATES Insulator Unused. Thank you. [Specifications] Retail Price: ¥24,000 (for 2 boxes) Quantity: 4 pieces Size: Diameter (approx. 70mm) x Height (approx. 35mm - adjustable) Function: Height adjustable with adjuster [Details/Features] Sub-base for 4-point support. Floating insulator using steel balls. Height can be adjusted with the adjuster. Keeps speakers and audio equipment in a floating state from the floor. Please refer to the instruction manual in the images for more details.