4" Diam x 49-3/8" Replacement Glass Tube w/ Rubber Ring for Gardensun, Hiland, Dyna-Glo, Legacy Patio Heaters. This replacement glass tube works for newer models of Pyramid Flame Propane Gas Patio Heaters that use a rubber O-ring at the bottom. In the Box: (1) One-piece glass tube 4" Diam x 49-3/8" L (100 x 1254 mm) (1) Black silicone rubber O-ring. WARNING. The black silicone ring must be in place prior to operating the heater. For a more water resistant replacement glass tube, please see the Quartz glass tube model BFC-A-SS-TUBE-4-QTZ The replacement glass tube guide below is for reference only, it is the client's responsibility to measure the glass tube to confirm the dimensions, manufacturers might change their size without notification. Gardensun Models: BFC-A-SS BFH-A-SS, BFH-A-PC Hiland / AZ Patio Heaters Models (made AFTER 2016): HLDS01-CGTHG, HLDS01-CGTSS, HLDS01-CGTPC HLDS01-GTHG, HLDS01-GTSS, HLDS01-GTPC HLDSO1-WGTHG NG-GT-BRZ Legacy Heating Models: CAPH-GT-S, CAPH-GT-SMOCHA, CAPH-GT-SS Dyna-Glo Models: DGPH301BL DGPH302SS Laurel / Shinerich Industrial Models: PH08-A, PH08-SB, PH08-SS (Square models only) Reference Part numbers: 584736, 639564.