ITEM NAME:20pcs 4 x 6 cm DIY Mini Double Sided Glass Fiber Prototyping Proto PCB Board Store Home | Home & Garden | Vehicle Parts & Accessories | Industrial | Computers/Tablets & Networking | Pet Supplies | Phones & Accessories | Electronics | Home Entertainment | Toys, Hobbies | Health & Beauty .like-pro-float .like-pro-price-both{clear: both;.Double green oil welding, not easy to oxidate or deform, high temperature resistant. - Hole pitch: 2.54mm. Specification: - Material: Glass Fiber. - Great for building a prototype of an electronic circuit.