ZHB1025 Features: * Suspension clamp and insulator * Designed to work in both 1.38" or 1.34" holes in wood or metal studs * Use with any CTS pipe * Side fins lock perfectly into I-joist knockout * Split design allows for use after piping is run * Durable and UV resistant * High density polyethylene is 100pct corrosion proof * Reduces noise due to expansion and contraction in hot water lines * 0.5" Copper tube size * 5 Per pack