VELOCITY PRECISION MADE ABEC 11 CERAMIC HYBRID BEARINGS X 4 PROVIDE THE BEST PERFORMANCE AND TOP DURABILITY NEW STOCK IN HAS NEW INCREDIBLE SPIN SPEED - YOU WILL NOT FIND FASTER CHECK OUT OUR FANTASTIC NEW RANGE OF COLOURED SEALS ALL AT FANTASTIC PRICES BEST PRICE ON EBAY Advantages of Hybrid bearings 60% lighter than steel balls Running speeds are 50% higher centrifugal forces are reduced lower vibration levelsless heat build upreduced ball skidding 50% higher elasticity Fatigue life reduced improved spindle rigidity Fatigue resistant low adhesive wear Improved lubricant lifeSuperior corrosion resistance Bearing service life is 5 times longer. MADE AT A DEDICATED BEARING MANUFACTURER .Low-Friction high speed nylon ball retainer with hardened ceramic balls. Pre-lubricated with racing oil for a super fast spin.Easy to remove low friction rubber Shields for easy servicing ,cleaning and re-lubrication.Std size 608rs (8x22x7mm). Fits all stunt push scooter wheels, skateboards Inline,derby & roller skates Bearings are rated on the abec scale from 1 to11 using only odd numbers and are ranked by how smooth they areand how much friction they produceThe higher the ABEC rating, the less friction is involved in the bearing's rotation, thus making wheels spin more freely with very little drag to slow them down PLEASE ALSO VIEW OUR LISTINGS FOR ABEC 11 & 9 BEARINGS