Single drive tube on inside housing cover for 625/630/640/647/649/639/642/635/637/650/655/7000/8000 Kavo OEM NÃÂ° 0.200.6038 Viton 60 Drive Air O-Ring fits most Kavo High Speed Handpieces. Access ring's location by unscrewing lower housing end of handpiece (counter clockwise). Remove housing completely and gently pull off air/water/optics manifold block. Three ss tubes are released. the center larger diameter tube is the air driving source tube. Replace o-ring at end. One required. Made in Germany.
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