Custom Made Square Rectangle Round Ring Seal Silicone Inflatable Seal Ring Rubber Silicone Inflatable Pipe Plug Tube. Customizable Shapes: Available in Round, Rectangular, Square, Trapezoidal, D, C, V shapes. Wide Material Options: EPDM, NBR, VMQ, Silicone, Rubber, TPE, Neoprene, NR, SBR. High Temp Resistance: Working temperature range from -60 to 280 degrees Celsius. Fast Prototype Delivery: Prototypes delivered within 3 to 7 days for urgent demands. One-Stop Service: Full service from mold to rubber parts, assembly, production, and packing. Free Samples: 1-2 pcs of free samples available for testing and evaluation. Certified Quality: Products certified with ROHS and ISO9001:2000 standards. Low MOQ: Minimum order quantity is only 10 pieces for customization.