durable and easy to install. Fine workmanship and perfect style. Model: 2200 holes Mechanical rigidity: rigidity Number of layers: single sided Base material: copper Insulation material: organic resin Insulation layer thickness: conventional board Flame retardant characteristics: V1 board Processing technology: electrolytic foil Reinforcement material: fiberglass cloth base Insulation resin: phenolic resin Material:composite material colour:As shown Package Contents: 1 x Bread board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.