Ishida Philippines Tube Co., Inc manufactures steel tubes in various forms and sizes be it in round, oval, square and rectangular shapes. Steel tubes is made of Hot or Cold Roller Steel Sheets in coil strips from Japan, Korea, Taiwan, China and Russia. Materials Classification currently used: SAPH, SPCC, SPCEN, SPHD, SPHC, SPFH, SPFC, SECC, STAM or STKM11-A, STKM13-A, STKM13-B