Product Page: ecofastensolar.com/store/pc/viewPrd.asp?idproduct=5&idcategory=7#.WMb0sPkrJaQ
The GreenFasten™ - GF1 system utilizes the patented watertight technology EcoFasten Solar is known for. The flashing is fit with our EPDM rubber bushing and when used with any EcoFasten Solar compression bracket (milled with countersink), a watertight seal is created, which maintains the integrity of the roof.
GreenFasten GF1 requires a single fastener (lag bolt or self-drilling), providing a very fast install. Backed by IAPMO certification, GreenFasten GF1 delivers a mounting solution for all new or existing (retrofit) composition shingle roofs.