specification：
colour：
use：
Code Size（MM） Wall thickness (MM) Color
UB1620 16 1.8 Red/Green/Lilac/Black
UB1622 16 2.2 Red/Green/Lilac/Black
UB2020 20 1.9 Red/Green/Lilac/Black
UB2028 20 2.8 Red/Green/Lilac/Black
UB2523 25 2.3 Red/Green/Lilac/Black
UB2535 25 3.5 Red/Green/Lilac/Black
UB3229 32 2.9 Red/Green/Lilac/Black
UB3244 32 4.4 Red/Green/Lilac/Black