Winter temperature (℃): 50 ° -85 ° liner material: SUS304 / 2B food grade stainless steel material: pearl plate collector tube length: 1.6 summer temperature (℃): 80 ° -100 ° Insulation Material: Polyurethane Bracket Material: Aluminum / color steel Brand: National Tsing Hua Huayang Model: ф58 × 1600mm8mm a detailed description: concentrate on professional design, the use of three high solar collector tubes, imported polyurethane foam molding, with nice, calm sturdy, economical and practical Features. II: aluminum frame, never rust, long service life. Vacuum tube: the effects of high temperature vacuum tube models: ф58 × 1600mm8mm storage tank: Imported SUS304-2B stainless steel (in line with the national drinking water standard) Housing material: pearl board PVDF≥70% corrosion resistant insulation: computer-controlled, high-voltage, temperature polyurethane overall Foam Thickness: 50-60mm bracket and materials: paint, flat oblique dual frame, wind, corrosion durable Fasteners: Stainless steel screws Seals: silicone rubber polymer reflective angle: 38 degrees --50 degrees