POM .Made in china .Dual-side Adjustable And NO SewingThe regular 1inch/25mm side release buckles require you to stitch one of them in place, No sewing is needed with Our 1inch/25mm plastic buckles. And You can adjust the strap on both sides. .Easy replacementVery easy to replace the regular release buckles or broken buckle on the hiking backpack and fanny Pack straps and Bayby carrier,waist pack,belt dog collars,harnesses, cat collars etc. They attach easily to web straps without the need for sewing. They are strong yet simple to use. .sturdy and durableMade of High quality material with good flexibility and Durability, These 1inch plastic buckles Passed 5000 tensile tests, These side release buckles 1 inch can withstand 77lbs(35kgs) pulling force. Hold tension well. .1 inch strap buckleThese 1 inch plastic clips are suitable for all 1 inch/25mm wide straps. The Plastic Buckle clip itselfs Size: Length 2.56X Width 1.22X Thickness 0.47(65x31x12mm). 2 sets included.