ROCK have specialized in this line for more than 19 years, we manufacturer the largest volume and range of spacer bars, Georgian bar, and IG glass sealant to the worldwide market including other accessory which supply by our cooperation factory. Rock take the lead to adopt the US Thermtool high frequency welding technology , now we have about 13 advanced spacer production lines, more lines will be introduced in future, Rock serves a high-end Aluminum spacer for the insulating glass. Rock now make it headquarter in Beijing. our products are very popular in worldwide market. Established 2001 Number of employee 105 Production line 13 We operate in 58 countries worldwide