xool 2 sets of solar panel roof mounting z-bracket with nuts and bolts for rv, boat, roof, wall and other off gird roof installation, set of 4 units xool </b>package included: </b> <br>●8 x z shape solar panel brackets <br>●8 x short bolts <br>●8 x split lock spring washers <br>●8 x washers <br>●8 x nuts <br>●16 x long cap bolts <br></b>notice: </b> <br>★not recommended for panels over 150 watt <br>★if you do want to use this product for panels over 150 watt, you would need 2 sets of this z bracket per panel