1.Product Name: HS1 base 2.Product Type: H4 base SUS 202 3.Manufacturer: Invitech China 4.Material of shell: SUS 202 5.Material of terminal: SUS 430 6.Resin type: black bakelite 7.Usage: motorcycle headlight lamp 8.Product specification: Base length: 36.3±0.3 mm; Assemble size of shell with cap: â??24-0.1mm; Length of welding hole: 0.9-1.2 mm; 9. Product Remark: This product is especially used for manual production line of H4 lamp; A fixed position on the shell matches H4 adaptor. Our advantages: 1. Mold and automation equipment are designed and manufactured by our experienced R&D team. 2. The core team has more than 30 years of experience in the field of precision stamping and plastic molding. 3. Highly automated production equipment ensures maximum productivity and lowest cost. 4. High consistent size of the components with millions of magnitude.