Superior Parts DB90-01 is a NR90AE & NR90AES – Driver & Bumper Kit which includes SP 885-918 piston driver & SP 884-959 piston bumper.SP 885-918 Piston Driver with O-Ring. Aluminum is crimped into the UNI-LOK grooves of the shaft to prevent unscrewing. Hardened steel lock tite and micro-mechanically locked piston driver interface. SP 884-959 Piston Bumper: Precision machined, virgin high density yellow color plastic framer bumper – PU Material.
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