Fernco FSDP-GP3G StormDrain Plus Channel Drain Contractor Pack , Grey All products are "uv" Inhibited - grates are ada and heel guard compliant Grates have non-slip textured surface - 3 bottom outlets in every channel No clips or screws required to assemble - class b: loads of 61-175 psi. The storm drain plus quad, end cap and end outlet just slide into the female end of the channels. Each have tabs to fit into the male end of the channels or the cut to length end of the channels.