Precision machined from aluminum, this FILL DRAIN PORT SQUARE CAP is the cap that goes on the outside of your case when you install an external fill or drain port. Topping off and bleeding air are also much much easier. It also features a telescoping side wall seal which keeps any over fill from splashing down inside your case and accommodates case thicknesses of 1mm to 6mm.Colour matched to all 10 Monsoon color finishes used on our full line of Free Center, Carbon, and Chain Gun compression fittings for hard and soft tube, as well as our full line of Rotaries, Light Port Rotaries, specialty plugs, etc.Includes colour matched stainless counter sunk socket head cap screws, a telescoping side wall O ring seal, a colour matched stop plug, 2 plug O rings, a mounting template, and a 5mm drill bit for mounting holes.INCLUDED:- 1 machined aluminum cap.- 4 color matched stainless counter sunk socket head cap screws.- 1 side seal O ring.- 1 color matched stop plug.- 2 stop plug O rings-one color matched, one black.- 1 drill bit 5mm.- 1 mounting template.- Assorted wrenches