1/2" to 24" 150lbs, 300lbs,600lbs,900lbs Specifications:Material: Low-Density PolyethyleneColor: natralFeatures:Protects threaded components from dust, moisture and damage during production, storage and shipmentDesigned with an easy to grip head for ease of hand installationFlanged Caps for Metric Threads,Flanged Caps for Standard Threads,Flanged Caps for Standard Threads NPT Threads