Tyco series TY-B standard response upright fire sprinkler head with standard coverage and 5mm bulb. Suitable for most ordinary and light-hazard applications. Chrome-plated finish for visual appeal. Technical Specifications: Type: Upright Sprinkler Response: Standard K-factor: 5.6 Coverage: Standard Temperature Rating: 155°F Inlet Connection: 1/2" NPT Bulb Size: 5 mm Max. working pressure: 250 psi Finish: Chrome Plated Approvals: UL, C-UL, FM, LPCB, NYC, VdS