CERROPI Newton Cradle Balance Balls, Pendulum with 7 Classic Swing Ball, Decorative Physics Gadget for Desk, Beech Base & Chromed Metal Stand, 11 inch, 50 Sec Swingtime

LONGEST SWING TIME：7 balls absolutely aligned with 50-60" swing time after cleaning the dust of balls.We guarantee swing 50s，otherwise we can full refund to you without return, contact with us via youtube with keywords of cerropi EUROPEN BEECH： The base is made of a strikingly elegant beech wood selected from sustainable European forests.Spare Ball - One extra ball and a string replacing manual inside package NANO TECHNOLOGY：The swing lines are made of high-impact nylon manufactured with nano technology for ultra-thin yet extremely durable oscillatory support CHROMED METAL FRAME：The 8.1mm diameter of frame are made of chromed metal steel.SPARE BALL - One extra ball and a string replacing manual inside package EXQUISITE PACKEGING：We use individual wrapping paper to protect each ball and secure it in foam shockproof material,Perfect for Christmas gIfts, Thanksgiving gifts, birthday gifts,Mother's Day gift,Father's Day gift,Valentine's Day gift etc. WARRANTY & NOTICE：1 YEAR warranty, If any piece breaks we send replacement balls, strings and plug to you. Messages reply within 12 hours. NOTE: clean the ball thoroughly before using for the longer swing time,one extra ball and a silky soft cleaning cloth are included in the package, Manufacturer: CERROPI