Provide a moderate amount of truck movement and range. SUPER RESPONSIVE || Great for those who prefer a super loose feel - The most responsive tuning offered with maximum truck movement and range PROFESSIONALLY DESIGNED || Modeled after conical-shaped skateboard tuning with fingerboarding in mind, bushings hold up to significant wear and tear Discover ergonomic solutions for your workspace with our ergonomic laptop stands . Enhance comfort and productivity with height- adjustable , portable designs that support better posture and reduce back and neck pain. Perfect for home or office use Teak Tuning Teak x Bubble Bushings Collaboration Tuning Kit, Pink, 1... Teak Tuning Pro Duro Bubble Bushings - 51A Bubble Bushings Pro Duro Series 71A (medium): A tighter feel allowing for crisper movement and tricks. UNIQUE SHAPE || With their unique shape and multiple firmness levels, Teak Tuning's Pro Duro series offers the most prolific level of customization of any fingerboard tuning on the market Teak Tuning Fingerboard O-Ring Bushings Pro Duro Series - Multiple Durometers - Black & White Teak Tunning Bubble Bushings Choking Hazard: Not suitable for children under 14 years of age. 51A DUROMETER || Black and White Swirl bubble bushings with a 51A hardness rating provide an extra loose ride - Compatible with all major fingerboard truck brands (including wider kingpin trucks like Dynamic and Y-Truck) Very responsive, extreme truck movement and range. This allows us to keep the same unique shape but offer multiple firmness levels and the most prolific level of customization of any fingerboard tuning on the market. Designed and assembled in the USA from parts from the USA and China.