... attachment Allows for easy operation Unfinished Walk-In Tub For Sales Our Bathtub is made of Environmental ... . Corrosion resistance , Aging resistance, high strength, nonconductiveetc.4.Keeping the temperature long time,and easy to clean. ... fiberglass(66%),Curing agent+gel coat+Limestone+release agent(4%) Adjustable stainless steel bottom supporterSurface MaterialGel coatWeight62.5KgThickness6. ...