Raspberry Pi 100Pcs M25 Series Hex Brass Spacers Standoffs+Nuts+Screws Kit Accessories for Raspberry Pi 5 /4B/3B+/3B/2B/B+ Note: For Raspberry Pi / Arduino or other development boards, the diameter of the installation holes on the board and the Pin Header hight have a great limit for their installation with expansion board or case. But with this M2.5 / M3 Hex Spacer/ Stainless Steel Screw / Nuts, you could DIY your project as you wish and it can do great help to Realize the idea of your genius! Overview: Popular Size: As a reason of Raspberry pi hat design: GPIO Pin connection (Expansion board) is about 11 mm high and the screw hole diameter is 2.75 mm, this spacer & screw & nuts pack is a perfect installation tool for Raspberry Pi 5/Raspberry Pi 4B/ Raspberry Pi 3 model B+ / 3B / 2B /B+. As user's need, Add 4 x M2.5x12+6mm spacer. More stander standoffs(spacers), more useful.(it is free!) Brass Hex Standoff/ Stainless Steel Screw / Nuts Assorted Kit; Screw thread: M2.5/(2.5mm), thread pitch: about 0.45mm; Male end thread length: 6mm; 100Pcs/Lot. Come with the plastic box; Easy to install and durable to use; Compatible with Raspberry Pi 5/ 4/ Raspberry Pi 3 B+ / Raspberry Pi 3 Model B / Raspberry Pi 2 Model B / B+/Raspberry Pi Zero W Packing List: 4 x M2.5x12+6mm Spacers(updation) 16 x M2.5x5 +5mm Spacers 16 x M2.5x11mm Spacers 16 x M2.5x11+6mm Spacers 16 x M2.5x20+6mm Spacers 16 x M2.5 x 5mm Screws 16 x M2.5 Nuts Note: The above numbers behind M are for spacer/screw/nut tooth diameter x length,the unit is mm. Example: M2.5 x 5mm Screws. _x000D_