For other products, please contact the shop’s customer service for a customised consultation. ? Model:Bakelite Multi-Purpose Board Specification size: 5X7/7X9/^X 15/10X 15/10X22/12X 18/13X25 15X 18/18X 30 Product material: Bakelite Hole diameter: 1.0MM Hole spacing: 2.54MM Thickness: 1.2mm Mechanical rigidity: rigid Layer: Single Side Universal board also called universal board, hole board, multi-purpose board, experimental board, is a kind of circuit board with holes, according to the standard IC spacing (2.54MM) covered with pads, according to their own wishes. Willingness to insert and install components and wiring of the printed circuit board. Compared with professional pcb board, the hole board has the following advantages: low threshold for use, low cost, use of Convenient, flexible expansion, you can change the components, layout and wiring. For example, in the circuit production, student electronic competition and electronic circuit product development In order to save time and cost, the work usually needs to use the universal board first for To save time and costs, works usually need to be made, debugged and optimised using a universal board first, and then batch-produced using PCBs after debugging and optimisation is completed. Or use the universal board to make circuit works, better understand the principle of the circuit and improve the soldering proficiency, enrich their knowledge of electronic circuits, and benefit the expansion and development of electronic circuit products. It is also beneficial to the expansion and development of electronic circuits. Differences between several types of universal boards. Bakelite Universal Board: Bakelite wood, with the glass fibre board material is slightly worse, natural hardness No glass fibre board strong, easy to bend, the panel is not very flat, pads are not sprayed tin, more Easy to oxidise and difficult to tin, novice soldering due to soldering iron temperature and soldering time may be not grasp well, repeated welding and desoldering, easy to weld bad pads. However, the price is low For basic users, the development cost is low, and it is also commonly used for novice soldering practice. CNC glass fibre universal board: glass fibre board material is good, not easy to deform, the panel has a – layer of green oil, pads using immersion gold Green oil, the pads using immersion gold process, is a layer of bare copper, showing a golden colour, not sprayed tin, the pads are less likely to be used. Not sprayed tin, the pad is not easy to weld bad, the price is medium, better cost performance. Glass fibre tin spraying universal board: glass fibre board material, pad tin spraying, not easy to oxidize, easy to It is easy to be tinned and convenient to be soldered. Pad is not easy to weld bad, help novice welding works. Material is very good, but the price is higher. According To Your Choose! Dear friend, Welcome to my store. Thank you give us chance to service for you. When we got your message that we will reply you ASAP. Product is on sale, you can get coupons and place order normally. And due to many factors, flights have been reduced, causing international logistics delays. We realy hope you can understand that. But please don’t worry, if you have the questions about the order, please contact with us at first. We will help you to solve it. We are always with you! The product should be within the maximum and minimum limit dimensions specified during manufacture in order to make the parts interchangeable. The permissible dimensional variations are called. The tolerances of products for sale are divided into positive and negative tolerances, with specific tolerance values varying according to the classification of the product, but all within the limits set by the industry. Please consult online customer service for specific tolerances. If a product is ordered, this tolerance is considered to be accepted by default. Select option 1 and option 2 or option 3 of the product…. Then, if you select the corresponding number under. Even if you want to order more varieties from this link, you must first set all selection fields to. Do not pay separately. If you are not sure, contact customer service in time.