APPLY TO - Expansion tube screws are supported by a wide application and used in home decoration, construction, industry, etc.Installed on many different types of materials.SPECIFICATION:Pipe Size: 7mm(D) x 27mm(L)/0.28" x 1.06"Screw Size: 4mm(D) x 30mm(L)/0.16" x 1.18"QUANTITY INCLUDED - 15pcs x Plastic Expansion TubesADVANTAGE - Fold the expansion tube in middle, insert it into a hole, and tap flush. Thread a screw through your fixture and into the expansion tube. When tightening the screw, the plastic tube will expand, increasing the fixing force.
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