Our company possesses 8,600 sets of O-ring specification molds and over 5,000 specifications for non-standard sealing rings (non-standard O-rings refer to dimensions outside the scope of standard parts, such as those beyond the national, American, Japanese, European, and French standard size series). Standard parts were established post-World War II through industrial development and mutual reference among countries. However, many specific working conditions require unconventional rubber rings, as non-standard sealing dimensions are not universal. When suitable rubber seals cannot be found, molds must be created! Precision rubber seal molds cost thousands. We have over 5,000 sets of non-standard O-ring molds and more than 3,000 sets of standard-size molds, all made with high-quality, genuine raw rubber. This helps customers save on R&D time and costs. Welcome to inquire (keywords: non-standard O-ring seals, uncommon rubber ring specifications, unconventional O-rings, non-standard rubber rings, special-shaped sizes. Our company also has over 1,600 sets of washer and flat washer molds, nearly 2,000 specifications for tiny precision seals, and custom rubber rings. Contact HKRUMSIN Enterprise for inquiries).

Huizhou Xiangjiang Lanxin Industrial Co., Ltd. is a wholly-owned subsidiary of Deli Precision Rubber Industry, a Hong Kong-funded enterprise located at Deli Industrial Park, Jurong Industrial Zone, Kowloon Half Mountain Road. Deli Xiangjiang Lanxin leverages the trend of the Guangdong-Hong Kong-Macao Greater Bay Area as a bridgehead market. The company covers an area of 15,000 square meters and specializes in high-precision machinery, aerospace, semiconductors, lasers, fluid equipment, optoelectronic medical devices, precision instrument accessories, unmanned automated machines, semiconductor metal and plastic parts, and high-precision microelectronic equipment accessories. We are a manufacturing and trading enterprise focused on new energy precision metal rubber and plastic parts, precision rubber products, metal and plastic accessories, high-precision tolerances at millimeter and micron levels, mold forming for communication equipment accessories, mechanical accessories, optical accessories, medical equipment accessories, and integrated production and sales of unmanned machine parts.

, mold injection molding and vulcanization production of precision accessories, plastic product parts, mechanical accessories, and the R&D, production, and sales of plastic and metal electronic products. Our sealing ring products are sold in North America and the EU, adhering to strict rubber ring standards. We implement Japanese production management, incorporating Japanese industrial practices since the 1990s, with 5S management and ISO systematic quality control. Production strictly follows rubber characteristics for vulcanization, adhering to quality standards SOP and SIP, and rigorously abides by the principles of man, machine, material, method, and environment. We currently have 8,600 mold types, using imported raw rubber materials, and provide integrated solutions for nylon and metal accessory products. Our diverse materials include PUR, PU with controlled softness and hardness, VITON O-rings, FKM, NBR rubber rings, IIR, CR, neoprene, NR, SBR rubber, PA, EPDM, HNBR rubber seals, FFKM, FLS, MVQ, FSIL, PVMQ rubber seals, washers, POLYSULFIDE, AU, ECO, ACM rubber and plastic, FMVQ, NYLON polyurethane rubber, fluororubber FKM, FPM, FMC, FLUOROCARBON, silicone SILICONE, nitrile rubber rings, styrene-butadiene high molecular rubber, sodium-butadiene rubber O-rings BUNA, chlorohydrin chloroprene rubber rings, hydrogenated nitrile rubber rings, EPDM seals, fluorosilicone rings, FFKM, FFPM, FFMC, FVT perfluoro rubber seals, FLAS fluorocarbon rubber, PA, PTFE, F4 acrylic rubber, isoprene rubber gaskets, polybutadiene material polyethylene, VAMAC, acrylate, and other rubber ring materials. Our specifications include over 8,000 rubber ring sizes, custom seals meeting American, Japanese, European, and French standards for O-rings and star rings, national standards, and a complete range of rubber ring specifications. We offer 8,600 seal size series, high-precision rubber parts standards, and custom rectangular rings, rubber gaskets, foot pads, X-star rings, ED rings, silicone plugs, miscellaneous silicone products, and rubber component development. We use first-line raw rubber products from Germany, the USA, and Japan, with custom products meeting food-grade, national standard, FDA, V-0, PAHS, ROHS, REACH, DFA, and LFGB standards.