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gbk99The Von Duprin 99GBK-CV-SP28 9899 Series Glass Bead Kit. For 9899 Surface vertical rod exit devices. Glass bead conversion kits are available for all 9899™ series devices for use on doors with raised glass beads.Tepat di kawasan GBK terdapat tempat makan yang selalu ramai pengunjung, yakni GBK Corner. Di sini, terdapat beberapa tennant makanan yang menyediakan beragam