DFG Low-E glass curtain wall 1. U value 1.3 W/ ... Lisec Low-E processing line DFG Low-E glass curtain wallFeatures1. Visible light transmittance: 7-80%2. Visible ... 350-180mm Custom size between the max and minWidth of Aluminum spacer (mm): 6, 9, 12, 16, 18, ... toughened clear float inner4mm toughened Low E inner, 16mm aluminum spacer, argon gas cavity with dual seal, 6 ... relevant L/C low-E glass curtain wall