Crafted for quick turning response and smooth edge-to-edge transitions, Orangatang Knuckles are the ultimate high-energy bushing upgrade for carving, pumping, dancing, and freestyle longboarding. What's included? Two insert barrel bushings, two gumdrop bushings, two large cup washers, and two small cup washers. SPECS Diameter: 0.95” Height (gumdrop): 0.64” Height (insert barrel): 0.59” barrel + 0.075” insert = 0.665” total Formula: Randy Thane (extremely high rebound, ideal for responsive, energetic turning) Durometers: soft (orange, 87a), medium (purple, 90a) Compatible with most longboard trucks (including Paris, Bear, Randal, Carver, Gullwing, Tracker, Caliber, etc). RESPONSIVE DESIGN — Two unique shapes for highly responsive and customizable turning. The inner diameter features precise tolerances for a snugger fit around the kingpin. The insert barrel features a small “step” to fill the gap between the kingpin and the hole of the hanger, reducing play in the assembly for a more precise response. The gumdrop is a smooth and subtle blend between a barrel and the more traditional cone shape, providing enhanced agility. The rounded edge allows for ultra-smooth turn initiation and improved interface with the washers. HIGHLY TUNABLE — In the standard configuration, the insert barrel is placed on the bottom and the gumdrop on the top. Also try double insert barrels (the height of the insert is half the thickness of a Paris bushing seat) or double gumdrops. Replace the included cup washers with flat washers for a less restrictive, highly linear turning rate. KNUCKLES vs. NIPPLES — Nipples provide maximum rebound for pumping and carving, lively yet supportive turning, and reduced wheelbite. Knuckles provide easier turn initiation with less resistance, quicker edge-to-edge response, and a greater ultimate lean angle.SOFT – Great for tight turns and maximum agility. THE PERFECT SET – Pack contains two insert barrel bushings, two gumdrop bushings, two large cup washers, and two small cup washers. HIGH-REBOUND FORMULA – Poured in our extremely high-rebound Randy Thane formula, ideal for responsive, energetic turning. RESPONSIVE DESIGN – Two unique shapes for highly responsive and customizable turning. Compatible with most trucks. The insert barrel features a small “step” to fill the gap between the kingpin and the hole of the hanger, reducing play in the assembly for a more precise response. The gumdrop is a smooth and subtle blend between a barrel and the more traditional cone shape, providing enhanced agility. The rounded edge allows for ultra-smooth turn initiation and improved interface with the washers. LIVELY BUSHINGS – Crafted for quick turning response and smooth edge-to-edge transitions, Orangatang Knuckles are the ultimate high-energy bushing upgrade for carving, pumping, dancing, and freestyle longboarding.Date First Available: April 10, 2019. Best Sellers Rank: #81,647 in Sports & Outdoors. Customer Reviews: 4.6 out of 5 stars 268 ratings 4.6 out of 5 stars. : B07PNYXRCH. Sport Type: ?Skateboarding. Part Number: ?KNBO. Manufacturer: ?Orangatang. Color: ?Orange, Soft. Brand Name: ?Orangatang. Item Dimensions LxWxH: ?5.91 x 1.97 x 5.91 inches. Package Weight: ?0.05 Kilograms. Item Package Dimensions L x W x H: ?5.67 x 3.74 x 0.71 inches.