Made of stainless steel plate. Good thickness of steel mesh.Can be directly heated , the steel mesh is not easy to be deformed by heat.16 pieces per set. Basically cover the current common BGA chips.The area of stencil matches the area of BGA chip, which can reduce the waste of solder balls. However, please consider purchasing the stencil for chips with uneven solder ball alignment or different distances.Universal Direct Heat BGA Stencil for Notebook, for Desktop, for , Northcom and Communication Motherboards and other Graphics Cards and Other Types of BGA Chips.16pcs stencils are as follows:1pc: 0.3 universal stencil(P=0.58mm)1pc: 0.35 universal stencil(P=0.6mm)1pc: 0.4 universal stencil(P=0.7mm)1pc: 0.45 universal stencil(P=0.78mm)1pc: 0.5 universal stencil(P=0.78mm)2pc: 0.6 universal stencil(P=0.9mm,P=1.1mm)1pc: 0.5 universal stencil(P=0.8mm)40mmx40mm4pcs: 0.6 universal stencil(P=0.99mm)24mmx24mm 27mmx27mm 30mmx30mm 41mmx41mm4pcs: 0.76 universal stencil(P=1.27mm)30mmx30mm 33mmx33mm 34mmx34mm 41mmx41mmColour:As ShownMaterial:stainless steelPackage Contents:1 * clamp16 * steel mesh1 * wrenchOnly 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.