GulongYa 50PCS Premium Bearing Assortment Kit, 100% GCr15 Bearing Steel High Precision Skateboard & 3D Printer Bearings, Includes 608-2RS, 608-ZZ, 625-ZZ, 623-ZZ, 693-ZZ with Organized Storage Box

Why it's a great deal

• Complete 50-Piece Pro Assortment: Never get caught mid-project without the right size. This heavy-duty kit features 5 most-popular industrial and DIY bearing models (10 PCS each): 608-2RS, 608-ZZ, 625-ZZ, 623-ZZ, and 693-ZZ. Perfectly pre-sorted to keep your workshop fully stocked and efficient.

• 100% Premium GCr15 Bearing Steel: Engineered for industrial-grade durability. Unlike cheap carbon steel alternatives, all GulongYa bearings are forged from high-carbon chromium bearing steel (GCr15). They deliver exceptional wear resistance, high-temperature stability, and a massive load capacity under high-speed rotations.

• Dual Sealing Technology for Max Performance: Get the best of both worlds! Features 608-2RS with Obsidian Black Rubber Seals to seal out dirt, mud, and water for harsh outdoor/skateboard use, and ZZ Metal Shields on other micro models for frictionless, lightning-fast spinning inside 3D printers and CNC machines.

• The Ultimate 3D Printer & DIY Companion: Tailor-made for makers and tech enthusiasts. The included 693-ZZ and 623-ZZ bearings are perfect fits for high-speed 3D printer extruders (such as Voron, Creality), idlers, and V-slot wheels. Perfect for upgrading skateboards, inline skates, scooters, and small robotics.

• 1: 1 Visual Mapping Smart Box: Say goodbye to cluttered hardware mess. Packaged in a compact $13 imes 9.5 imes 1.8 ext{ cm}$ transparent storage box that easily slips into toolboxes. Inside the lid, a beautifully designed, clear visual map coordinates with every single grid slot, letting you grab the exact size you need in a split second.