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This is a 12-pack box of Plexus MA310 (31500) MMA (Acrylic) adhesive, and includes the 12 needed mixing nozzles. PlexusMA310 is a two-part methacrylate (MMA) adhesive designed for structural bonding of thermoplastic, metal, and composite assemblies. Plexus MA310 replaces an older popular Devcon formula Plastic Welder 2 (14340). It is the same formula inside, but is now branded under the ITW Plexus name. Combined at a 1:1 ratio, MA310 is a medium-curing adhesive system. MA310 offers a combination of high strength and stiffness as well as the ability to bond a wide range of materials. Plexus MA310 is supplied in ready-to-use 50-ml and 400-ml cartridges, 5-gallon (20-liter) pails, or 50-gallon (200-liter) drums to be dispensed as a non-sagging gel. No Surface Preparation High Strength High Modulus 100% Reactive Excellent Tolerance to Off-Ratio Mixing Non-Sagging Material characteristics: Room Temperature Cure Working Time 15 - 18 minutes Fixture Time 45 - 55 minutes Operating Temperature -67°F - 250°F (-55°C - 121°C) Gap Filling 0.03 in. - 0.125 in. (0.75 mm - 3.2 mm) Mixed Density 8.0 lbs/gal (1.00 g/cc) Flash Point 51°F (11°C)