TC Bros Throttle Tube Assembly For 1 Bars TC Bros. 1 throttles feature an investment cast aluminum housing, appealing for its simplicity and elegance. Its billet aluminum grip tube, CNC machined and knurled, is designed for versatility, compatible with a wide array of aftermarket rubber grips, facilitating customizations on HD motorcycles without the bulky throttle/switch housings. Features: Eliminates the bulky throttle/switch housings on custom H-D motorcycles Design features an investment cast aluminum housing Billet aluminum throttle tube CNC machined with a knurled finish to accept a huge variety of aftermarket rubber grips Accommodates nearly every stock or aftermarket Harley one piece style grip by simply installing in place of the included TC Bros. throttle tube Each throttle includes a variety of H-D style chrome plated ferrules (both threaded and snap lock style) to allow universal fitment