specification：
colour： Red
use：
Code Size（MM） Wall thickness (MM) Color
UA1620 16 2.0 Red/Green/Lilac/Black
UA1622 16 2.2 Red/Green/Lilac/Black
UA2020 20 2.0 Red/Green/Lilac/Black
UA2028 20 2.8 Red/Green/Lilac/Black
UA2523 25 2.3 Red/Green/Lilac/Black
UA2535 25 3.5 Red/Green/Lilac/Black
UA3229 32 2.9 Red/Green/Lilac/Black
UA3244 32 4.4 Red/Green/Lilac/Black
UA4037 40 3.7 Red/Black
UA4055 40 5.5 Red/Black
UA5046 50 4.6 Red/Black
UA5069 50 6.9 Red/Black
UA6358 63 5.8 Red/Black
UA6386 63 8.6 Red/Black