Specification of Hollow iron size 20/30/40 - 250
Hollow iron consists of various materials available
That is
1. black hollow iron made from ordinary black carbon
2. Galvanized hollow iron
tp for this type must go through the galvanic process which is usually called hot deep galvanizing or dyeing
3. Hollow stainless
This material is made of stainless steel, namely SS 304 type
4. Follow galvum
Or commonly called zincalum
Usually used as a gypsum prisoner chain
Available sizes
20 x 20
30 x 30
40 x 40
Up to you
250 x 250
