Boldtbags Frozen Dry Sift Kief Box with Brush

Boldtbags Frozen Dry Sift Kief Box with Brush Dry sifting kief demands food-safe materials at every contact point — and most off-the-shelf setups fall short the moment you look past the screen. The Boldtbags Frozen Dry Sift Kief Box with Brush is built entirely from 100% food-grade materials, pairing an NSF-compliant polyethylene box with a pharmaceutical-grade nylon brush and a pre-stretched 165-micron screen on a food-grade aluminum frame, so there is no weak link in your extraction chain. The 165u screen is mounted using Boldtbags' proprietary automatic stretching process, ensuring uniform tension across the full 23" × 15" working surface. This high-tension mesh technology is a staple of the brand, also featured in the Boldtbags CO2 extraction shaker kit for those needing specialized 160-micron filtration. The frame is powder-coated aluminum assembled with food-grade glue — the same contact-safe standard applied across the entire kit. A Certificate of Compliance ships with every unit for processors who maintain quality documentation. Whether you're running frozen material or ambient-temperature dry sift, the Boldtbags Frozen Dry Sift Kief Box gives you a self-contained, fully compliant setup that's ready to run from the first session. For larger batches or multi-stage refinement, the Boldtbags static dry sift 4 screen kit provides a high-capacity solution for professional grading. Features 🧊NSF-Compliant Food-Grade Box The polyethylene box and lid are NSF compliant and 100% food safe — no material compromises at any contact point in the extraction process. 🪥Pharmaceutical-Grade Nylon Brush The included brush meets pharmaceutical-grade standards, giving you a safe, effective tool for moving material across the screen without contamination. 🔬165 Micron Pre-Stretched Screen The 165u screen is precision-stretched using Boldtbags' proprietary automatic machine for uniform tension and consistent filtration across the full working surface. 🖼️Food-Grade Aluminum Frame The screen is mounted on a powder-coated aluminum frame using food-grade glue, maintaining full contact-safety from frame edge to mesh center. 📐23" × 15" Working Surface The generous frame dimensions give you ample room to work material efficiently without crowding the screen or sacrificing yield per pass. 🇺🇸Assembled in the U.S.A. Every screen is precision manufactured domestically. A Certificate of Compliance is included for processors who require quality assurance documentation. What's Included NSF-Compliant Dry Sift Box with Lid Pharmaceutical-Grade Nylon Brush 165u Dry Sift Screen (23" × 15") Certificate of Compliance Specifications Specification Value Frame Dimensions 23" × 15" Screen Micron Size 165u Frame Material Food-grade powder-coated aluminum Adhesive Food-grade glue Box Material Food-grade polyethylene (NSF compliant) Brush Material Pharmaceutical-grade nylon Food Safe 100% — all contact materials food grade Origin Assembled in the U.S.A. Included Documentation Certificate of Compliance Frequently Asked Questions What micron size does this kief box use?+ This kit includes a single 165-micron dry sift screen. The 165u rating is well-suited for kief collection, allowing fine trichome heads to pass through while retaining larger plant material above the screen. Is this kit safe for food-grade extraction?+ Yes — every contact material in this kit is 100% food grade. The box is NSF-compliant polyethylene, the brush is pharmaceutical-grade nylon, and the screen is mounted with food-grade glue on a food-grade powder-coated aluminum frame. What are the screen frame dimensions?+ The screen frame measures 23" × 15", providing a large working surface for efficient material processing. The lid-equipped box keeps your workspace contained between passes. How is the screen stretched and mounted?+ The screen is pre-stretched using Boldtbags' proprietary automatic stretching machine before being mounted to the aluminum frame with food-grade glue. This process ensures uniform tension across the entire mesh surface for consistent filtration. What is the nylon brush used for?+ The pharmaceutical-grade nylon brush is used to agitate and move material across the screen surface during the dry sifting process. Its food-safe construction ensures no contamination is introduced during contact with your material. Does this kit include a Certificate of Compliance?+ Yes, a Certificate of Compliance is included with every kit. This documentation confirms the screens meet Boldtbags' food-grade manufacturing standards and is useful for commercial processors maintaining quality assurance records. Where is this kit manufactured?+ The Boldtbags Frozen Dry Sift Kief Box is assembled in the U.S.A. using precision manufacturing techniques developed specifically for consistent, high-quality dry sift screen production.