Roll Bars are fabricated from the highest quality seamless tubing and T-304 Stainless Steel Tubing Attractive and durable black powder coated finish Harness bar is integrated into this bar (not X brace version) Complete instructions and hardware kit with grade 8 bolts and 3/16"" mounting plates Top Boots & Tonneau Covers will require modification to fit Limited seat travel and tilt Fitments available for hard tops or soft tops with plastic windows only. Glass window soft tops see Hardcore M2 bars Hard top fitment places hoop slightly further back and is not as tall as soft top fitment, may be preferable for taller drivers Tubing is 1.75"" Diameter x .120"" wall thickness SCCA & NASA Approved Padding: You've installed the roll bar to keep you safe in case of a roll-over, and now you've noticed just how close your head is to all that steel. Protect your head with high density, SFI spec, 5/8" thick foam padding.