Ninja Glass Rainbow 4-Part Metal Herb Grinder – Windowed – 1½″

Compact, colorful, and cleverly practical. This Ninja Glass rainbow-finish metal grinder adds a viewing window so you can keep an eye on your stash without opening the chamber.

Key Features & Specs

• Size & Material: 1½″ diameter (approx. 40 mm); zinc-alloy metal
• Build: 4-part design with grinding chamber, pollen screen, and kief catcher
• Teeth & Grip: Diamond-style teeth and textured knurled body for an easy twist
• Window: Side viewing window shows chamber level at a glance
• Included: Pollen scraper
• Best For: Dry herb
• Finish: Iridescent rainbow with Ninja Glass logo lid
• Sold Individually: One grinder per order

Why You’ll Love It
The windowed midsection takes the guesswork out of prepping, while the fine mesh screen saves your kief for later. Durable zinc-alloy construction and a textured grip make daily use smooth and steady, and the compact 1½″ footprint slips easily into pockets or travel kits.

Pro Tips for Best Use

• Brush out residue and wipe with a dedicated cleaning solution—find options in our Cleaners section.
• Avoid prolonged soaking; dry thoroughly after spot-cleaning.

Intended for legal use by adults 21+. Keep out of reach of children.

Add this stealthy, rainbow-finished grinder to your cart today and enjoy fast, discreet U.S. shipping.