Stainless frame only for stacking glass block. This is just a stainless frame round, gc constructs wall. This model is 4" deep to accomodate real glass block. Ring is anchored on each side with 1 or 2 swedge anchors. An optional spreader can be purchased at the top if you wish to run F-350 trucks without folding back mirros, or also recommended when using a dual transporter belt conveyor.