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By certification 
ADJUSTABLE HEIGHT SHOWER BENCHES WITH TOOL-FREE DETACHABLE ARMRESTS & BACKREST #JL736LQ
Description
1. 4 legs are made of lightweight & durable aluminum tubes
2. Each leg has a spring lock pin for adjusting seat height (5 Levels, from 36.5-46.5cm)
3. Seat panel is made of high strength PE
4. Armrests & backrest are tool-free detachable & offer additional comfort
5. Seat panel has some holes in order to drain the surface water and reduce the accident of slipping
6. Each leg has a anti-slip rubber tip
7. Support weight is up to 250 lbs.
http://www.nhjianlian.com/
