Newly designed Stealth Series racks are low profile, bomber, and designed to work with factory holes in Ski-doo Gen 4 and Polaris Matryx tunnels as well as with the Polaris T-slot systems. Designed to be used with Boardski 2.0 brackets3mm aerospace aluminum side platesUV-restistant black anodized coating Large: 21-1/8" long (SKI DOO / LYNX : 16" WIDE. POLARIS / ARCTIC CAT / YAMAHA : 15" WIDE).1 cargo space measuring 10 1/4" and 1 space measuring 5 1/4" (perfect for 1 RT, Dime, or QP bag and 1 gas can). * ALL NECESSARY HARDWARE IS INCLUDED, AS WELL AS CUSTOM ANODIZED ALUMINUM MOUNTING PLATES THAT FIT UNDER THE TUNNEL, WHICH ADDS STRENGTH AND EASES INSTALLATION (FOR SKI DOO / LYNX AND POLARIS). TO CARRY SKIS AND/OR SNOWBOARDS USE BOARD-SKI 2.0 BRACKETS (SOLD SEPARATELY). FOR SNOWBOARDS AND/OR POW SURFERS USE POW SURF BRACKETS (SOLD SEPARATELY). Included Items:(2) Black aluminum side plates (2) Black aluminum tunnel support plates (7) 15-1/4" Black aluminum rods (15) Rod end plugs (10) 1/4"-20 x 3/4" Carriage bolts (10) 1/4'-20 Nylock nuts (10) 1/4" Flat washers (10) 1/4"-20 x 3/4" Square head bolts