1. The aluminum-plastic compound tube`s inner and outer layers are both of PEX, clean, no-pollutant, smooth2. Little liquid resistance, uneasy-fouling, non-polluted liquid but making large efficient p
1. The aluminum-plastic compound tube`s inner and outer layers are both of PEX, clean, no-pollutant, smooth2. Little liquid resistance, uneasy-fouling, non-polluted liquid but making large efficient p