... spring include pipe inner spring and pipe outer spring Pipe bending springFor PEX/AL/PEX pipes.The spring include pipe inner spring and pipe outer spring ... .Material: steel Pipe inner spring:Size: 12mm, 16mm, 20mm, ... time: within 20 days after getting the deposite Pipe outer spring:Size: 16.2mm, 20.2mm, 26.3mm, 32.3mmLength: ...