Mtsooning Pneumatic Mufflers, 10PCS Sintered Bronze Exhaust Silencer, Male Thread Hex Brass Muffler Fitting 1 4" NPT BSL 02 1 4" sold2025 Package includes: 6 12mm (or 1 4 AC wide voltage input Package includes: 6 12mm (or 1 4 7 16 inch) 10pcs 10 16mm (or 3 8 5 8 inch) 10pcs 13 19mm (or 1 2 3 4 inch） 10pcs 16 25mm (or 5 8 1 inch） 10pcs 19 29mm (or 3 4 1 1 8inch) 10pcs 18 32mm (or 3 4 1 1 4 inch) 5pcs 21 38mm (or 13 16 1 1 2 inch) 5pcs Note: Large quantity order can be applied for the more favorable price three phase Limit Support Voltage : 2000 V min Operating Frequency Range : 20 Hz ~ 400 HzLimit Time for Continuous Use: 60 minutes maximum at 60V AC 4 minutes maximum at 600V ACTest Leads: Double insulation Length of test leads: approx Product Features Material: Mufflers use porous sintered bronze filter elements fixed on standard pipe fittings