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for colleagues, this is a solution for those who want to install frames or replace old frames with custom or non-standard sizes, we can make our own with varying sizes following the finished building, the manufacturing process is also simple, not too complicated materials: 0.75mm thick steel channel 4x2 light steel hollow thickness above 0.20mm 15mm roofing bolts 4x11mm rivet nails HOPE IT'S USEFUL Let's support TJJ and treat coffee = https://sociabuzz.com/tukangjadijadia... DON'T FORGET TO SUBSCRIBE, LIKE, COMMENT & SHARE email business / Endorsement = [email protected] instagram = / tukangjadijadian facebook = www.facebook.com/agus.tukangjadijadian/