XSPC Raystorm CPU Block for Intel Socket LGA 1156, 1155, 1366, and 2011 High Performance Copper Base 56 x 56 x 3 mm CNC Cut Acetal Top. G1/4" Threads (Fittings not included). Compatible with Most Compression Fittings (If in doubt about compatibility, please ask before purchasing). 4 x 3 mm LED Holes.